CN109932388A - A kind of Electroplastic fuel factor and non-thermal effect decouple separation method - Google Patents
A kind of Electroplastic fuel factor and non-thermal effect decouple separation method Download PDFInfo
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Abstract
The present invention discloses a kind of Electroplastic fuel factor and non-thermal effect decouples separation method, cover high current and low current by design, it is asynchronous to be loaded with synchronous, electric current heating and a set of method of contrast of traditional heat transfer/heat radiation heating, each experiment own advantages are utilized, avoid the influence that single experiment cannot be efficiently peeled off fuel factor, the final presence for confirming non-thermal effect, realize that fuel factor is separated with the decoupling of non-thermal effect, and verifying Electroplastic main function object is dislocation, non-thermal effect is mainly reflected in electric current and changes interacting state between dislocation, reduce the lattice resistance of dislocation motion, promote sliding, the rule that fuel factor is affected by temperature with non-thermal effect is obtained simultaneously.
Description
Technical field
The present invention relates to Technology of Plastic Processing fields, decouple more particularly to a kind of Electroplastic fuel factor and non-thermal effect
Separation method.
Background technique
In plastic processing loading current, often there is the phenomenon that resistance of deformation reduction, plasticity improves in metal material,
Referred to as electro plastic effect.Electric current assist formation is the one kind for combining electro plastic effect with traditional plastic working technique
Advanced forming technique.For fields such as Aeronautics and Astronautics to light-weight high-strength material and the forming integrated manufacture of light weight efficient configuration, height
The requirement of efficiency and Digital manufacturing, electric current assist formation have shown it and have improved metal material, especially lightweight, difficult deformation
Advantage in terms of material property.
In the application and research process of electric current assist formation, based on electro plastic effect, most important effect is played.
Research understands that electro plastic effect mechanism could fully utilize its spy to microstructure regulation, raising metal material formability
Point, to for exploitation electric current assist formation technology and its application in plastic processing field be promoted to provide theories integration.However, by
It is related to electromagnetic field, temperature field, deformation field and the effect of external force field coupled in common, and electric field under electric current secondary load in metal material
There is complexity with controllable parameters such as thermo parameters method, material deformation state and microstructure inhomogeneities, imitate Electroplastic
It answers the research of mechanism and its applies great challenge.Currently, the mechanism of production of electro plastic effect is still disputable, it has been suggested that theory
By whether there is or not the contributions of temperature (thermal energy) can be divided into two classes: fuel factor and non-thermal effect.Fuel factor is mainly derived from joule heating effect,
Non-thermal effect is then mainly comprising electronics wind scorpion, magnetic effect etc..Currently, electro plastic effect mechanism study still has both sides
Problem: first is that whether material softening caused by joule heating effect is electro plastic effect producing cause；Second is that electronics wind scorpion and
Magnetic effect lacks reliable accurate experimental verification analysis, whether there is non-thermal effect and still has dispute.Therefore electroluminescent modeling is studied
Property effector mechanism is confirmed whether that there are non-mainly around how efficiently separating Electroplastic fuel factor and non-thermal effect
Fuel factor.A large amount of research work has been carried out to this domestic and foreign scholars, it is main on the whole to think using different experimental designs
Road is by the air blast cooling in loading current or being filled with liquid nitrogen makes material keep specific temperature (such as room temperature, low temperature) to exclude
Influence of the Joule heat to material.However since Joule heat is that electronics and crystal lattice act on caused fever phenomenon, this convection current
Cooling can not inhibit the generation of material internal Joule heat, not eliminate Joule heat inherently；Furthermore defect in metal material,
The difference of tissue morphology causes temperature field under micro-scale uneven, and it is practical that the temperature of macroscopic measurement is difficult accurate Characterization material
Temperature, therefore make result of study that can not exclude the influence of fuel factor.
Based on the above analysis, Electroplastic fuel factor is interweaved with non-thermal effect, can not simply physically
Directly remove；Simultaneously more or less there are some defects in previous relatively single experimental design, can not fully and effectively exclude
The influence of joule heating effect and other factors.
Summary of the invention
The object of the present invention is to provide a kind of Electroplastic fuel factor and non-thermal effects to decouple separation method, can be realized pair
Fuel factor is effectively decoupled with non-thermal effect and is separated.
To achieve the above object, the present invention provides following schemes:
A kind of Electroplastic fuel factor and non-thermal effect decouple separation method, comprising:
The asynchronous loading experiment of high current is carried out to predeformation metal material sample, is obtained under the asynchronous loading experiment of high current
Work hardening rate variation and elongation percentage recovery situation；
Annealing heat-treatment experiment under traditional burner heating method is carried out to predeformation metal material sample, is obtained at annealing heat
Work hardening rate variation and elongation percentage recovery situation under reason experiment；
According to the work hardening rate variation and elongation percentage recovery situation under the asynchronous loading experiment of the high current and described move back
Work hardening rate variation and elongation percentage recovery situation under fiery heat treatment experiment, obtain the information of fuel factor；
The synchronous loading experiment of low current is carried out to metal material sample, the stress obtained under the synchronous loading experiment of low current is answered
Become the influence with work hardening rate；
Isothermal Hot stretching experiment is carried out to metal material sample, obtains the ess-strain under Isothermal Hot stretching experiment and hardening
Index variation with temperature curve；
According to variation and the Isothermal Hot of ess-strain and work hardening rate under the synchronous loading experiment of the low current
Ess-strain and hardenability value variation with temperature curve under stretching experiment, obtain the information of non-thermal effect.
Optionally, described that the asynchronous loading experiment of high current is carried out to predeformation metal material sample, it is asynchronous to obtain high current
Work hardening rate variation and elongation percentage recovery situation under loading experiment, specifically include:
Certain pre edformation is loaded to metal material sample, then carries out the asynchronous loading experiment of high current, in experimentation
High current density is 30A/mm2~60A/mm2, load number is 1~3 time, and persistently 10s, every minor tick 30s, acquisition are big electric every time
Flow work hardening rate variation and the elongation percentage recovery situation under asynchronous loading experiment.
Optionally, the method also includes:
The asynchronous loading experiment of high current is carried out to predeformation metal material sample and traditional burner is carried out to metal material sample
After annealing heat-treatment experiment under heating method, the metal material after experiment is air-cooled to room temperature, to the metal being cooled to room temperature
Material be uniaxially stretched until fracture.
Optionally, the method also includes:
The synchronous loading experiment of low current is carried out to metal material sample and isothermal hot-stretch reality is carried out to metal material sample
Uniaxial direct tensile is extremely broken when testing.
Optionally, all strain rates being uniaxially stretched are 10-3s-1。
Optionally, the asynchronous loading experiment of the high current and annealing heat-treatment experiment target temperature range be 500 DEG C~
850 DEG C, it is 18 DEG C~95 DEG C that the low current, which synchronizes loading experiment and the target temperature range of Isothermal Hot stretching experiment,.
Optionally, described that the synchronous loading experiment of low current is carried out to metal material sample, it is real to obtain the synchronous load of low current
The influence of ess-strain and work hardening rate under testing, specifically includes:
The synchronous loading experiment of low current is carried out to metal material sample, experimentation small current density is 6A/mm2~
10A/mm2, the load time, which is less than or equal to, is uniaxially stretched the time, obtains the ess-strain under the synchronous loading experiment of low current and adds
The influence of work hardening ratio.
Optionally, the electric current load phase of the synchronous loading experiment of the low current uses elastic stage or plastic stage.
The specific embodiment provided according to the present invention, the invention discloses following technical effects: the present invention provides a kind of electricity
Cause plasticity fuel factor and non-thermal effect to decouple separation method, pass through the multi-level comparison of setting: high current and low current, it is asynchronous with
Synchronous load, electric current heating and traditional heat transfer/heat radiation heating comparison, Comprehensive Experiment test method a set of in this way utilize
Each experiment own advantages, avoid the influence that single experiment cannot be efficiently peeled off fuel factor, finally confirm non-thermal effect
Presence, realize that fuel factor is separated with the decoupling of non-thermal effect, and verifying Electroplastic effective object is dislocation, high current is asynchronous
The local joule heat generated when load plays the role of similar annealing, and non-thermal effect is mainly reflected in electric current and changes between dislocation
Interacting state, reduce the lattice resistance of dislocation motion, promote sliding, at the same obtain fuel factor and non-thermal effect by
The rule that temperature influences.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is that Electroplastic fuel factor of the present invention and non-thermal effect decouple separation method flow chart；
Fig. 2 is used specimen shape scale diagrams by the present invention；
Fig. 3 is TC4 titanium alloy original sample stress-strain diagram of the present invention and work hardening rate curve；
Dislocation evolution when Fig. 4 is high current of the present invention asynchronous load；
Fig. 5 is ess-strain and work hardening rate curve after the asynchronous load of high current of the present invention；
Fig. 6 is ess-strain and work hardening rate curve after annealing heat-treatment of the present invention；
Fig. 7 is the synchronous load schematic diagram of low current of the present invention；
Fig. 8 is that low current of the present invention ess-strain and work hardening rate under elastic stage or plastic stage synchronous load are bent
Line；
Fig. 9 is low current of the present invention ess-strain and work hardening rate curve under the synchronous load of different plasticity stage；
Figure 10 is the synchronous load of low current of the present invention and Isothermal Hot tensile stress strain curve and hardenability value with temperature
Variation；
Figure 11 is the variation of fuel factor of the present invention and non-thermal effect with current density.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of Electroplastic fuel factor and non-thermal effects to decouple separation method, can be realized pair
Fuel factor is effectively decoupled with non-thermal effect and is separated.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Fig. 1 is that Electroplastic fuel factor of the present invention and non-thermal effect decouple separation method flow chart.As shown in Figure 1, a kind of
Electroplastic fuel factor and non-thermal effect decouple separation method, comprising:
Step 101: the asynchronous loading experiment of high current being carried out to predeformation metal material sample, obtains the asynchronous load of high current
Work hardening rate variation and elongation percentage recovery situation under experiment；
Step 102: the annealing heat-treatment under traditional burner heating method being carried out to predeformation metal material sample and is tested, is obtained
Work hardening rate variation and elongation percentage recovery situation under annealing heat-treatment experiment；
Step 103: being changed and elongation percentage recovery situation according to the work hardening rate under the asynchronous loading experiment of the high current
Work hardening rate variation and elongation percentage recovery situation under testing with the annealing heat-treatment, obtain the information of fuel factor；
Step 104: the synchronous loading experiment of low current being carried out to metal material sample, is obtained under the synchronous loading experiment of low current
Ess-strain and work hardening rate influence；
Step 105: Isothermal Hot stretching experiment being carried out to metal material sample, obtains the mechanical property under Isothermal Hot stretching experiment
It can variation with temperature curve；
Step 106: according to variation and the institute of ess-strain and work hardening rate under the synchronous loading experiment of the low current
The ess-strain and hardenability value variation with temperature curve under Isothermal Hot stretching experiment are stated, the information of non-thermal effect is obtained.
Step 101, it specifically includes:
Certain pre edformation is loaded to predeformation metal material sample, then carries out the asynchronous loading experiment of high current, is tested
High current density is 30A/mm in the process2~60A/mm2, load number is 1~3 time, and single continues 10s, and every minor tick 30s is obtained
The work hardening rate under the asynchronous loading experiment of high current is taken to change and elongation percentage recovery situation.
The method also includes:
The asynchronous loading experiment of high current is carried out to predeformation metal material sample and predeformation metal material sample is carried out
After annealing heat-treatment experiment under traditional burner heating method, the metal material after experiment is air-cooled to room temperature, to being cooled to room temperature
Metal material be uniaxially stretched until fracture.
The synchronous loading experiment of low current is carried out to metal material sample and isothermal hot-stretch reality is carried out to metal material sample
It tests, is directly uniaxially stretched to fracture.
All strain rates being uniaxially stretched are 10-3s-1。
The asynchronous loading experiment of the high current and the target temperature range of annealing heat-treatment experiment are 500 DEG C~850 DEG C, institute
The target temperature range for stating the synchronous loading experiment of low current and isothermal hot-stretch is 18 DEG C~95 DEG C.
Step 104, it specifically includes:
The synchronous loading experiment of low current is carried out to metal material sample, experimentation small current density is 6A/mm2~
10A/mm2, the load time, which is less than or equal to, is uniaxially stretched the time, obtains the ess-strain under the synchronous loading experiment of low current and adds
The influence of work hardening ratio.The electric current load phase of the synchronous loading experiment of the low current uses elastic stage or plastic stage.
The present invention passes through asynchronous and synchronous two ways loading current, stretched acquisition ess-strain when being uniaxially stretched
Curve.By carrying out derivation to stress-strain diagram, acquisition work hardening rate curve Θ:
Wherein σ is true stress；ε is logarithmic strain.As shown in figure 3, the curve is divided into A, B, C three phases, the A stage is
Elastic stage is to the transition stage of plastic stage, and dislocation is due to the inhibition that the pinning or dislocation of solute atmosphere are rolled into a ball and in steady
Determine state, is not yet slid.At D point, largely pinned dislocation, which strains at the leass, starts to slide, and progresses into B-stage, this rank
Dislocation movement by slip and mobile dislocation quantity increased stage of the section for de- nail, move number of dislocations close to saturation when reaching E point.C
Stage is the sliding of titanium alloy tissue Dislocations, proliferation, interaction stage.Therefore from the angle of work hardening rate, can reflect indirectly
Influence of the pulse current to dislocation.In the asynchronous load of high current, the B-stage of TC4 titanium alloy sample disappears, and shows pulse current
Eliminate the dislocation of predeformation generation；By transmission electron microscope tem analysis, pulse treated sample compares initial samples, dislocation
Group almost disappears, and dislocation line is elongated and tends to be arranged in parallel.It can be seen that pulse current is to metal material under the asynchronous load of high current
Effective object be mainly dislocation and effect it is very significant.Traditional stove heating (heat transfer, heat radiation) mode, pulse are compared simultaneously
The material of processing also shows that the difference with conventional annealing processing, illustrates two kinds of heating methods simultaneously inequivalence.Due to asynchronous load
Joule heating effect when high current forms Local Phase to significant joule heating effect (high current especially at fault location such as dislocation
When processing, apparent temperature is 500 DEG C -850 DEG C, is in TC4 titanium alloy annealing region), therefore setting low current synchronizes and adds
Load makes further research.It is loaded by the way that low current is synchronous, specimen temperature range is made to maintain 100 DEG C hereinafter, far below annealing temperature
Degree；Temperature rise is slow when loading low current simultaneously, and the hot-stretch with traditional heating mode is suitble to compare.It is being stretched through design
The comparison for deforming different phase load low current obtains ess-strain and work hardening rate when plastic stage and elastic stage load
There are significant differences, even if (loading low current when such as 2% strain, temperature is risen to by 25.7 DEG C close to room temperature in temperature change
30.3 DEG C) when this species diversity also significantly exist, thus prove non-thermal effect presence.Then by adding with heat transfer, heat radiation
The hot-stretch of hot mode compares, and stress-strain diagram and hardenability value variation with temperature, obtain pulse under the conditions of two kinds of analysis
The difference of electric current and traditional heating mode is that the former generates " local joule fuel factor " in fault location.Synthesis is asynchronous and synchronous to be added
The result of load, it is first determined pulse current main function object is dislocation, further weakens the influence of fuel factor, it was demonstrated that non-thermal effect
The presence answered show that Electroplastic non-thermal effect is mainly reflected in electric current and changes by work hardening rate, the difference of hardenability value
Interacting state between dislocation, reduces the lattice resistance of dislocation motion, promotes sliding.
The sample material used in various embodiments of the present invention is TC4 titanium alloy plate, with a thickness of 1.5mm.Sheet material forming work
Skill is, through 820 DEG C, 30min anneals (original state) after cold rolling.Fig. 2 is used tensile sample geomery schematic diagram by the present invention.
Tensile sample geomery schematic diagram is as shown in Fig. 2, gauge length is 25mm, width 6mm.
Embodiment one
The present embodiment be the asynchronous loading experiment of high current, specific implementation process the following steps are included:
The first step installs dielectric holder, TC4 titanium alloy sample is placed in fixture, and adjustment sets cupping machine
Parameter.
Second step is then offloaded to 500-1000N, prevents from loading to the predeformation amount of TC4 titanium alloy sample load 7%
Since thermal expansion leads to sample deformation when pulse current；Fig. 3 is TC4 original sample stress-strain diagram of the present invention and processing hardening
Rate curve.
Third step opens thermal imaging system and starts to record a video, by single load 10s, the mode load pulses electricity of every minor tick 30s
Stream, pulse current density 44.4A/mm2, duty ratio 10%, frequency 100Hz；
4th step, pulse current load after, when sample is air-cooled to room temperature, carry out tissue topography's observation (Fig. 4) or
Person carries out uniaxial tensile test to obtain stress-strain diagram and work hardening rate curve (Fig. 5)；Fig. 4 is that high current of the present invention is different
The evolution of dislocation when step load, wherein Fig. 4 (a) is 7% predeformation；Fig. 4 (b) is that load is primary；Fig. 4 (c) is to load twice；
Fig. 4 (d) is to load three times.Fig. 5 is ess-strain and work hardening rate curve after the asynchronous load of high current of the present invention, wherein Fig. 5
It (a) is stress-strain diagram, Fig. 5 (b) is work hardening rate curve.
In conjunction with Fig. 4 and Fig. 5 it is found that pulse current makes the B-stage of work hardening rate curve disappear, i.e., pulsed current annealing when
Effective object is mainly dislocation, can eliminate intermeshing high density dislocation.Fig. 6 answers for stress after annealing heat-treatment of the present invention
Change and work hardening rate curve, wherein Fig. 6 (a) is stress-strain diagram, and Fig. 6 (b) is work hardening rate curve.By Fig. 5 with it is right
Result (Fig. 6) than embodiment 1 compares, it can be seen that pulsed current annealing and traditional heat transfer or heat radiation heating method
There are larger differences for influence to material deformation, further reflect that the influence of local joule fuel factor and non-thermal effect exist
Possibility.But in this embodiment, high current bring fuel factor is also relatively significant, therefore need to further exclude.
Embodiment two
The present embodiment is the synchronous loading experiment of low current.Since temperature is lower under low current loading environment, and change slowly,
Convenient and hot-stretch is contrasted experiment, therefore selection synchronizes loading experiment in the case where low current.Specific implementation process
The following steps are included:
The first step installs dielectric holder, TC4 titanium alloy sample is placed in fixture, and adjustment sets cupping machine
Parameter；
Second step installs electrode holder, adjusts pulse current parameter are as follows: current density 6.7A/mm2And 8.9A/mm2, duty
Than being 10%, frequency 100Hz；
Third step opens thermal imaging system and starts to record a video, and by scheduled loading sequence and loads moment (as shown in Figure 7), into
The load of row power and pulse current load, are finally stretched to TC4 titanium alloy sample fracture.Fig. 7 is the synchronous load of low current of the present invention
Schematic diagram.
Fig. 8 is that low current of the present invention ess-strain and work hardening rate in elastic stage load synchronous with the plastic stage are bent
Line, wherein Fig. 8 (a) is stress-strain diagram, and Fig. 8 (b) is work hardening rate curve.As shown in Figure 8, under synchronous loading environment,
It loads and is loaded in elastic stage in the plastic stage that strain reaches 2% and apparent difference is presented, i.e. the appearance of inflection point, and at this time
Temperature only rises to 30.3 DEG C from 25.7 DEG C, and close to room temperature and under the conditions of so small temperature change, fuel factor is negligible, but answers
Significant changes occur for stress-strain curve and work hardening curve, it was demonstrated that the presence of non-thermal effect.Fig. 9 is that low current of the present invention exists
The lower ess-strain of different plasticity stage synchronous load and work hardening rate curve, wherein Fig. 9 (a) is stress-strain diagram, Fig. 9
It (b) is work hardening rate curve.As can be seen from Figure 9 in the plastic stage load that strain is 2%-4%, curve occurs
Apparent rapid drawdown, and as the increase rapid drawdown of strain is more significant.Even if further illustrating under low current, lower temperature, pulse electricity
Stream also produces effect to dislocation, and then is reflected in the significant difference of work hardening rate.Figure 10, which is that low current of the present invention is synchronous, to be added
Load and Isothermal Hot tensile stress strain curve and hardenability value variation with temperature, wherein Figure 10 (a) is Isothermal Hot tensile stress
Strain curve, Figure 10 (b) and Figure 10 (c) are the synchronous loading curve of low current, and 10 (d) be hardenability value variation with temperature song
Line.For the difference (as shown in Figure 10) of 2 hardenability value of comparative example, reflect that pulse current can reduce dislocation resistance,
Promote its movement, and then leads to lower hardenability value；It is larger also to illustrate that non-thermal effect is affected by temperature simultaneously, with temperature liter
Height, hardenability value quickly increase, which may be capped, which also illustrates in high current, and lower point of higher temperature conditions
Be from fuel factor it is relatively difficult, as shown in figure 11.Figure 11 is the variation of fuel factor of the present invention and non-thermal effect with current density.
Comparative example 1
Comparative example 1 is annealing heat-treatment comparative experiments, and specific implementation step is as follows:
The first step, sample maximum temperature when surveying asynchronous load high current according to embodiment 1, is warming up to phase for heat-treatment furnace
It is synthermal；
The TC4 titanium alloy sample of 7% predeformation is placed in middle position in heat-treatment furnace by second step, the processing time be up to
To minimum time used in target temperature；
Third step takes out sample from heat-treatment furnace, after being air-cooled to room temperature, carry out uniaxial tensile test until fracture with
Stress-strain diagram and work hardening rate curve are obtained, as a result as shown in Figure 6.
Comparative example 2
Comparative example 2 is synchronous load hot-stretch comparative experiments, and specific implementation step is as follows:
It is close to start the loading current (as shown in the arrow of the lower half portion Figure 10) in the elastic stage different moments of stretching for the first step
Degree is 6.7A/mm2And 8.9A/mm2Low current until fracture, electric current loads that the moment is more early, and yield point temperature increases, but entire
Experimentation temperature maintains between 18~95 DEG C；
TC4 titanium alloy sample is placed in heat-treatment furnace by second step, when being surrendered according to the synchronous load low current sample of the first step
Temperature, the heat-treatment furnace of isothermal hot-stretch is warming up to corresponding temperature: 18 DEG C, 40 DEG C, 65 DEG C, 95 DEG C, carries out Isothermal Hot
It stretches until fracture；
Third step compares stress-strain diagram obtained by the first step and second step and hardenability value, as a result such as Figure 10
It is shown.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright description is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
Used herein a specific example illustrates the principle and implementation of the invention, and above embodiments are said
It is bright to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, foundation
Thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (8)
1. a kind of Electroplastic fuel factor and non-thermal effect decouple separation method characterized by comprising
The asynchronous loading experiment of high current is carried out to predeformation metal material sample, obtains the processing under the asynchronous loading experiment of high current
Hardening ratio variation and elongation percentage recovery situation；
Annealing heat-treatment experiment under traditional burner heating method is carried out to predeformation metal material sample, it is real to obtain annealing heat-treatment
Work hardening rate variation and elongation percentage recovery situation under testing；
According to the work hardening rate variation and elongation percentage recovery situation and annealing heat under the asynchronous loading experiment of the high current
Work hardening rate variation and elongation percentage recovery situation under processing experiment, obtain the information of fuel factor；
The synchronous loading experiment of low current is carried out to metal material sample, obtain ess-strain under the synchronous loading experiment of low current and
The influence of work hardening rate；
Isothermal Hot stretching experiment is carried out to metal material sample, obtains ess-strain and hardenability value under Isothermal Hot stretching experiment
Variation with temperature curve；
According to the variation and the isothermal hot-stretch of ess-strain and work hardening rate under the synchronous loading experiment of the low current
Ess-strain and hardenability value variation with temperature curve under experiment, obtain the information of non-thermal effect.
2. Electroplastic fuel factor according to claim 1 and non-thermal effect decouple separation method, which is characterized in that described
The asynchronous loading experiment of high current is carried out to predeformation metal material sample, obtains the processing hardening under the asynchronous loading experiment of high current
Rate variation and elongation percentage recovery situation, specifically include:
Certain pre edformation is loaded to metal material sample, then carries out the asynchronous loading experiment of high current, big electricity in experimentation
Current density is 30A/mm2~60A/mm2, load number is 1~3 time, and single continues 10s, every minor tick 30s, and it is different to obtain high current
Walk work hardening rate variation and the elongation percentage recovery situation under loading experiment.
3. Electroplastic fuel factor according to claim 1 and non-thermal effect decouple separation method, which is characterized in that described
Method further include:
The asynchronous loading experiment of high current is carried out to predeformation metal material sample and tradition is carried out to predeformation metal material sample
After annealing heat-treatment experiment under stove heating mode, the metal material after experiment is air-cooled to room temperature, to the gold being cooled to room temperature
Belong to material be uniaxially stretched until fracture.
4. Electroplastic fuel factor according to claim 1 and non-thermal effect decouple separation method, which is characterized in that described
Method further include:
When carrying out the synchronous loading experiment of low current to metal material sample and carry out Isothermal Hot stretching experiment to metal material sample
It is stretched to fracture.
5. Electroplastic fuel factor according to claim 1 and non-thermal effect decouple separation method, which is characterized in that described
All strain rates being uniaxially stretched are 10-3s-1。
6. Electroplastic fuel factor according to claim 1 and non-thermal effect decouple separation method, which is characterized in that described
The asynchronous loading experiment of high current and the target temperature range of annealing heat-treatment experiment are 500 DEG C~850 DEG C, and the low current is synchronous
The target temperature range of loading experiment and Isothermal Hot stretching experiment is 18 DEG C~95 DEG C.
7. Electroplastic fuel factor according to claim 1 and non-thermal effect decouple separation method, which is characterized in that described
The synchronous loading experiment of low current is carried out to metal material sample, obtains the ess-strain under the synchronous loading experiment of low current and processing
The influence of hardening ratio, specifically includes:
The synchronous loading experiment of low current is carried out to metal material sample, experimentation small current density is 6A/mm2~10A/
mm2, the load time, which is less than or equal to, is uniaxially stretched the time, obtains the ess-strain under the synchronous loading experiment of low current and processes hard
The influence of rate.
8. Electroplastic fuel factor according to claim 7 and non-thermal effect decouple separation method, which is characterized in that described
The electric current load phase of the synchronous loading experiment of low current uses elastic stage or plastic stage.
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| CN112051144A (en) * | 2020-08-13 | 2020-12-08 | 北京航空航天大学 | Pure electro-plasticity auxiliary thermal forming process for hard-material-state high-strength aluminum alloy |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101298653A (en) * | 2008-05-26 | 2008-11-05 | 清华大学深圳研究生院 | High-strength high-toughness AZ91 magnesium alloy strip eletrotoughening process method and system |
| CN102172620A (en) * | 2011-02-09 | 2011-09-07 | 清华大学深圳研究生院 | Method and system for rolling difficult-to-machine metal material by combining electro-plasticity with temperature plasticity |
| CN109553414A (en) * | 2018-12-28 | 2019-04-02 | 西南交通大学 | A kind of zirconia ceramics plastic processing method of DC electric field auxiliary |
-
2019
- 2019-04-04 CN CN201910268453.5A patent/CN109932388B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101298653A (en) * | 2008-05-26 | 2008-11-05 | 清华大学深圳研究生院 | High-strength high-toughness AZ91 magnesium alloy strip eletrotoughening process method and system |
| CN102172620A (en) * | 2011-02-09 | 2011-09-07 | 清华大学深圳研究生院 | Method and system for rolling difficult-to-machine metal material by combining electro-plasticity with temperature plasticity |
| CN109553414A (en) * | 2018-12-28 | 2019-04-02 | 西南交通大学 | A kind of zirconia ceramics plastic processing method of DC electric field auxiliary |
Non-Patent Citations (5)
| Title |
|---|
| HUAN-YANG XIE 等: "Electroplastic effect in AZ31B magnesium alloy sheet through uniaxial tensile tests", 《TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA》 * |
| HUANYANG XIE 等: "Experimental investigation on electroplastic effect of DP980 advanced high strength steel", 《MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING》 * |
| MOON-JO KIM 等: "Modified Johnson-Cook Model Incorporated With Electroplasticity for Uniaxial Tension Under a Pulsed Electric Current", 《METALS AND MATERIALS INTERNATIONAL》 * |
| XING-RONG CHU 等: "Experimental Investigation on Formability of AZ31B Magnesium Alloy V-Bending Under Pulse Current", 《ACTA METALLURGICA SINICA-ENGLISH LETTERS》 * |
| 丁俊豪 等: "电塑性及电流辅助成形研究动态及展望", 《航空学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112051144A (en) * | 2020-08-13 | 2020-12-08 | 北京航空航天大学 | Pure electro-plasticity auxiliary thermal forming process for hard-material-state high-strength aluminum alloy |
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