CN106525582B - A method of judging the 5052 aluminium alloy flat cold-rolled sheet plasticity containing microelement - Google Patents
A method of judging the 5052 aluminium alloy flat cold-rolled sheet plasticity containing microelement Download PDFInfo
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- CN106525582B CN106525582B CN201610989496.9A CN201610989496A CN106525582B CN 106525582 B CN106525582 B CN 106525582B CN 201610989496 A CN201610989496 A CN 201610989496A CN 106525582 B CN106525582 B CN 106525582B
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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Abstract
The present invention discloses a kind of method for judging the 5052 aluminium alloy flat cold-rolled sheet plasticity containing microelement, it includes following steps: step 1, the 5052 aluminium alloy flat cold-rolled sheets containing microelement are processed into rectangular cross section tensile sample by GB/T228-2002 requirement, carry out tensile test at room temperature；Step 2, observes the fractograph pattern of the 5052 aluminium alloy flat cold-rolled sheets containing microelement, and discovery can be divided into constriction, brittle failure area and three, the area Ren Duan region from outside to inside；Step 3 compares the transient condition between constriction, the trizonal depth width in brittle failure area and the area Ren Duan and adjacent area, judges the plasticity size of the 5052 aluminium alloy flat cold-rolled sheets containing microelement.Its is easy to operate, can intuitively reflect the 5052 aluminium alloy fractograph patterns containing microelement and the corresponding relationship between alloy plasticity.
Description
Technical field
The present invention relates to the methods for judging aluminium alloy plasticity, and in particular to a kind of 5052 aluminium alloys of the judgement containing microelement
The method of flat cold-rolled sheet plasticity.
Background technique
The production method of material during tensile sample is defined in GB/T228-2002, size requires and the phase of tension test
Parameter is closed, and the elongation after fracture and the contraction percentage of area of material are defined.The disadvantages are as follows: currently, judging that aluminium closes
The standard of golden plate material plasticity height is usually carried out by calculating the specific value of above-mentioned two index, but it can not be with
Aluminum alloy organization forms specific corresponding relationship；In fact, one important idea is " material during design of material
Organization decided material property ", therefore only come the plasticity for judging aluminum alloy plate materials be insufficient by above-mentioned two indices.
Summary of the invention
The object of the present invention is to provide it is a kind of judge the 5052 aluminium alloy flat cold-rolled sheet plasticity containing microelement method,
It is easy to operate, it can intuitively reflect 5052 aluminium alloy fractograph patterns containing microelement and corresponding between alloy plasticity
Relationship.
The present invention is achieved through the following technical solutions:
A method of judging the 5052 aluminium alloy flat cold-rolled sheet plasticity containing microelement, it includes following steps:
The 5052 aluminium alloy flat cold-rolled sheets containing microelement are processed into rectangular cross section tensile sample by step 1, are carried out
Tensile test at room temperature；
Step 2 observes the fractograph pattern of the 5052 aluminium alloy flat cold-rolled sheets containing microelement, and discovery is from outside to inside
Constriction, brittle failure area and three, the area Ren Duan region can be divided into；
Step 3 compares the mistake between constriction, the trizonal depth width in brittle failure area and the area Ren Duan and adjacent area
Situation is crossed, judges the plasticity size of the 5052 aluminium alloy flat cold-rolled sheets containing microelement.
Further, the step 1 is added the 5052 aluminium alloy flat cold-rolled sheets containing microelement by GB/T228-2002 requirement
The rectangular cross section tensile sample of work carries out tensile test at room temperature.
Further, the constriction of the step 2 is the glide step for being in 45° angle and being parallel to each other approximate with specimen surface,
The calculation method of its depth width is the distance between specimen surface to glide step mean depth.
Further, the brittle failure area of the step 2 is river shape or rock sugar shape pattern, the calculation method of depth width are
Constriction inboard boundary to river shape or rock sugar shape pattern averagely extends the distance between depth.
Further, the area Ren Duan of the step 2 is made of a large amount of dimple groups, and the calculation method of depth width is brittle failure
Area's inboard boundary is the distance between to fracture central core.
Further, when constriction, brittle failure area and three, the area Ren Duan region depth width meet: (the constriction area+Ren Duan)/crisp
Disconnected area >=4, and adjacent area level it is poor≤20 μm, transitions smooth, alloy plasticity is higher；When constriction, brittle failure area and tough
Disconnected three region depth width in area meet: (the constriction area+Ren Duan)/brittle failure area < 4, and 20 μ of adjacent area level difference >
M, transition is unsmooth, and alloy plasticity is lower.
The beneficial effects of the present invention are: can be sentenced rapidly by observing the 5052 aluminium alloy fractograph patterns containing microelement
The plasticity superiority and inferiority situation of disconnected such alloy out；Meanwhile establishing 5052 aluminium alloy fractograph patterns and plasticity containing microelement
Between corresponding relationship, also can for such alloy design provide it is more accurate judgement plasticity size method.
Detailed description of the invention
Fig. 1 is the thick 5052 aluminium alloy flat cold-rolled sheet fractograph pattern subregion schematic diagrames of 0.5mm；
Fig. 2 is the depth width calibration schematic diagram of the thick 5052 each subregions of aluminium alloy flat cold-rolled sheet fractograph pattern of 0.5mm；
Fig. 3 is that the depth of 5052 aluminium alloy flat cold-rolled sheet fractograph pattern each subregions of the 0.5mm thickness containing 1.33%Cu is wide
Scale determines schematic diagram；
Fig. 4 is that the depth of 5052 aluminium alloy flat cold-rolled sheet fractograph pattern each subregions of the 0.5mm thickness containing 0.029%Sr is wide
Scale determines schematic diagram；
Fig. 5 is the depth width of 5052 aluminium alloy flat cold-rolled sheet fractograph pattern each subregions of the 0.5mm thickness containing 0.1%Er
Demarcate schematic diagram；
Fig. 6 is that the depth of 5052 aluminium alloy flat cold-rolled sheet fractograph pattern each subregions of the 0.5mm thickness containing 0.05%Zr is wide
Scale determines schematic diagram.
Specific embodiment
The present invention is described further combined with specific embodiments below.
5052 aluminium alloy flat cold-rolled sheets are processed into the rectangular cross-sectional of 0.5mm thickness by embodiment 1 by GB/T228-2002 requirement
Face tensile sample carries out tensile test at room temperature；The fractograph pattern of the 5052 aluminium alloy flat cold-rolled sheets containing microelement is observed,
Referring to Fig. 1, discovery can be divided into constriction, brittle failure area and three, the area Ren Duan region from outside to inside, wherein constriction is and sample table
For face approximation in 45° angle and the glide step that is parallel to each other, the calculation method of depth width is that specimen surface is flat to glide step
The distance between equal depth；Brittle failure area is river shape or rock sugar shape pattern, and the calculation method of depth width is on the inside of constriction
Boundary to river shape or rock sugar shape pattern averagely extend the distance between depth；The area Ren Duan is made of a large amount of dimple groups, depth
The calculation method of width is the distance between brittle failure area inboard boundary to fracture central core；When constriction, brittle failure area and the area Ren Duan
Three region depth width meet: (the constriction area+Ren Duan)/brittle failure area >=4, and adjacent area level it is poor≤20 μm, mistake
It crosses smoothly, alloy plasticity is higher；When constriction, brittle failure area and three, the area Ren Duan region depth width meet: (constriction+tough disconnected
Area)/brittle failure area < 4, and 20 μm of > of adjacent area level difference, transition is unsmooth, and alloy plasticity is lower.
Embodiment 2, it is shown in Figure 2, it is wide with secret note calibration constriction, the trizonal depth in brittle failure area and the area Ren Duan
Degree, it is 74.0 μm that measurement, which can obtain 5052 aluminium alloy constriction depth width, and brittle failure area depth width is 59.2 μm, the area Ren Duan depth
Width is 88.8 μm, adjacent area level is poor≤and 20 μm, transitions smooth.
Embodiment 3, it is shown in Figure 3, it is wide with secret note calibration constriction, the trizonal depth in brittle failure area and the area Ren Duan
Degree, the 5052 aluminium alloy constriction depth width that measurement can must contain 1.33%Cu are 85.1 μm, and brittle failure area depth width is 33.3 μ
The area m, Ren Duan depth width is 129.5 μm, and 20 μm of > of adjacent area level difference, transition is unsmooth.
Embodiment 4, it is shown in Figure 4, it is wide with secret note calibration constriction, the trizonal depth in brittle failure area and the area Ren Duan
Degree, the 5052 aluminium alloy constriction depth width that measurement can must contain 0.029%Sr are 61.1 μm, and brittle failure area depth width is 48.1
μm, the area Ren Duan depth width is 114.7 μm, adjacent area level is poor≤and 20 μm, transitions smooth.
Embodiment 5, it is shown in Figure 5, it is wide with secret note calibration constriction, the trizonal depth in brittle failure area and the area Ren Duan
Degree, the 5052 aluminium alloy constriction depth width that measurement can must contain 0.1%Er are 51.8 μm, and brittle failure area depth width is 40.7 μ
The area m, Ren Duan depth width is 122.1 μm, adjacent area level is poor≤and 20 μm, transitions smooth.
Embodiment 6, it is shown in Figure 6, it is wide with secret note calibration constriction, the trizonal depth in brittle failure area and the area Ren Duan
Degree, the 5052 aluminium alloy constriction depth width that measurement can must contain 0.05%Zr are 81.4 μm, and brittle failure area depth width is 31.5 μ
The area m, Ren Duan depth width is 133.2 μm, adjacent area level is poor≤and 20 μm, transitions smooth.
Observe 5052 aluminium alloys and its addition 1.33%Cu, 0.029%Sr, 0.1%Er, 0.05%Zr microalloying alloy
Fractograph pattern measures constriction, the trizonal depth width in brittle failure area and the area Ren Duan, in conjunction with adjacent area transition respectively
Situation evaluates the plasticity of 5052 aluminium alloys containing microelement, as a result as shown in the table.
Tension test is carried out according to the regulation of GB/T228-2002, the elongation after fracture measured is as shown in the table.
Constriction is mainly that the violent body deformation stage before aluminium alloy is broken is formed, and aluminium alloy has passed through at this time
Maximum load is gone through, with the extension of load time, aluminium alloy underbead crack increases substantially, until final fracture, therefore constriction
Depth width be able to reflect the deformability of aluminium alloy before fracturing.
The area Ren Duan is normally at flat cold-rolled sheet center, is made of the different dimple of a large amount of shapes；Currently, grinding both at home and abroad
The person of studying carefully reflects the toughness of alloy often with dimple size and distribution, it can reflect the deformability of alloy to a certain extent, and
And alloy ductility is better, occur brittle fracture a possibility that it is just smaller, deformability is stronger, and plasticity is higher.
Brittle failure area is the proof that brittle fracture occurs for alloy, and brittle failure area is narrower under normal circumstances, and the deformability of alloy is got over
By force, plasticity is higher.
Before breaking, the uncoordinated of metaplasia can cause stress concentration to sample, this is showed in adjacent area changeover portion
It is especially prominent, be to cause crackle rapidly to extend and make alloy that the major reason of substantive fracture occur, therefore observe adjacent region
Whether domain transition is smooth, can help to judge the plasticity height of 5052 aluminium alloys containing microelement.
Claims (2)
1. a kind of method for judging the 5052 aluminium alloy flat cold-rolled sheet plasticity containing microelement, it is characterised in that include following step
It is rapid:
The 5052 aluminium alloy flat cold-rolled sheets containing microelement are processed into rectangular cross section tensile sample, carry out room temperature by step 1
Tension test；
Step 2, observes the fractograph pattern of the 5052 aluminium alloy flat cold-rolled sheets containing microelement, and discovery can divide from outside to inside
For constriction, brittle failure area and three, the area Ren Duan region；The constriction is approximate with specimen surface to be in 45° angle and is parallel to each other
Glide step, the calculation method of depth width are the distance between specimen surface to glide step mean depth；The brittle failure
Area is river shape or rock sugar shape pattern, and the calculation method of depth width is constriction inboard boundary to river shape or rock sugar shape shape
Looks averagely extend the distance between depth；The area Ren Duan is made of a large amount of dimple groups, and the calculation method of depth width is crisp
Disconnected area's inboard boundary is the distance between to fracture central core；
Step 3 compares the transition feelings between constriction, the trizonal depth width in brittle failure area and the area Ren Duan and adjacent area
Condition judges the plasticity size of the 5052 aluminium alloy flat cold-rolled sheets containing microelement；When constriction, brittle failure area and area, three, the area Ren Duan
Domain depth width meet: (the constriction area+Ren Duan)/brittle failure area >=4, and adjacent area level it is poor≤20 μm, transition put down
Sliding, alloy plasticity is higher；When constriction, brittle failure area and three, the area Ren Duan region depth width meet: (the constriction area+Ren Duan)/
Brittle failure area < 4, and 20 μm of > of adjacent area level difference, transition is unsmooth, and alloy plasticity is lower.
2. a kind of method for judging the 5052 aluminium alloy flat cold-rolled sheet plasticity containing microelement according to claim 1,
Be characterized in that: the 5052 aluminium alloy flat cold-rolled sheets containing microelement are processed into square by GB/T228-2002 requirement by the step 1
Shape cross section tensile sample carries out tensile test at room temperature.
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| SU1495676A1 (en) * | 1987-03-16 | 1989-07-23 | Московский Инженерно-Физический Институт | Method for determining plastic anisotropy of metalds |
| CN1837407A (en) * | 2006-04-19 | 2006-09-27 | 东南大学 | Method for treating surface of magnesium or alloy thereof |
| CN101710049A (en) * | 2009-11-09 | 2010-05-19 | 北京航空航天大学 | Method for testing tensile mechanical performance of TiAl-base alloy |
| CN103526091A (en) * | 2013-09-15 | 2014-01-22 | 郑州大学 | Biodegradable medical magnesium alloy as well as preparation method thereof |
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2016
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU493696A1 (en) * | 1971-12-01 | 1975-11-28 | The method of determining the depth of the hardened surface peeled layer | |
| SU1495676A1 (en) * | 1987-03-16 | 1989-07-23 | Московский Инженерно-Физический Институт | Method for determining plastic anisotropy of metalds |
| CN1837407A (en) * | 2006-04-19 | 2006-09-27 | 东南大学 | Method for treating surface of magnesium or alloy thereof |
| CN101710049A (en) * | 2009-11-09 | 2010-05-19 | 北京航空航天大学 | Method for testing tensile mechanical performance of TiAl-base alloy |
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| 《AZ31B镁合金板材的塑性加工成型研究》;王里进;《中国优秀博硕士学位论文全文数据库 (硕士)工程科技Ⅰ辑》;20070415;正文第19，,24-25页 |
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