CN102519818A - Thermal fatigue performance test and analysis method for metal matrix composite material - Google Patents
Thermal fatigue performance test and analysis method for metal matrix composite material Download PDFInfo
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- CN102519818A CN102519818A CN2011104450901A CN201110445090A CN102519818A CN 102519818 A CN102519818 A CN 102519818A CN 2011104450901 A CN2011104450901 A CN 2011104450901A CN 201110445090 A CN201110445090 A CN 201110445090A CN 102519818 A CN102519818 A CN 102519818A
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- 238000004458 analytical method Methods 0.000 title claims abstract description 21
- 239000000463 material Substances 0.000 title claims abstract description 15
- 238000011056 performance test Methods 0.000 title claims abstract description 12
- 239000011156 metal matrix composite Substances 0.000 title abstract 4
- 239000002131 composite material Substances 0.000 claims abstract description 40
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000005498 polishing Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000010191 image analysis Methods 0.000 claims abstract description 6
- 208000037656 Respiratory Sounds Diseases 0.000 claims description 25
- 208000025599 Heat Stress disease Diseases 0.000 claims description 16
- 238000005336 cracking Methods 0.000 claims description 13
- 238000012360 testing method Methods 0.000 claims description 7
- 238000004445 quantitative analysis Methods 0.000 claims description 6
- 238000005088 metallography Methods 0.000 claims description 5
- 238000010791 quenching Methods 0.000 claims description 5
- 238000009826 distribution Methods 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 abstract description 2
- 239000011159 matrix material Substances 0.000 abstract description 2
- 238000011282 treatment Methods 0.000 abstract 2
- 230000000977 initiatory effect Effects 0.000 abstract 1
- 230000035939 shock Effects 0.000 description 10
- 239000002245 particle Substances 0.000 description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 206010011906 Death Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000006253 efflorescence Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The invention provides a thermal fatigue performance test and analysis method for a metal matrix composite material. According to the method, a metal matrix composite material specimen is cut into cubic blocks, and the surface with the matrix and the composite layer is grinded into the polishing state; a heat treatment is performed until the specimen is completely heated and the temperature is increased; the heated specimen is placed in water with a room temperature, such that the specimen is chilled to the room temperature; a polishing treatment is performed, a metallographic microscope is adopted to observe the grinded surface, and the crack and the composite layer are photographed; treatments of heating, cooling and observing are repeatedly performed a plurality of times, the photographed pictures are subjected to quantitative crack analysis by using a thermal fatigue crack image analysis system, wherein the thermal fatigue failure mechanism, the manners of the thermal fatigue crack initiation and the thermal fatigue crack expansion can be analyzed so as to achieve the thermal fatigue performance test and analysis of the metal matrix composite material. According to the present invention, the method of the present invention has characteristics of simple operation, and strong controllability; the crack distribution, the crack shape and other factors of various fields are comprehensively considered, such that the result is close to the actual result.
Description
Technical field
The present invention relates to the method for a kind of metal-base composites hot fatigue performance test and analysis, belong to metal-base composites performance test and analysis field.
Background technology
Thermal fatigue failure is meant that metal-base composites is under the effect of chilling and shock heating cycle alternation; Near the macroscopic interface of composite bed and substrate metal and composite bed inside can form the phenomenon of pattern cracking, and heat fatigue is that metal-base composites uses one of principal mode that lost efficacy under the chilling and shock heating operating mode.
At present still not having precedent about the evaluation of metal-base composites thermal fatigue property and analytical approach can follow; Evaluation about thermal fatigue property only is confined on the hot die steel; But it is out of true as a result; The people is that the error that causes is relatively large, and the narrow limits considered of the hot fatigue performance test of hot die steel and analytical approach, does not consider the factor such as form, distribution situation of crackle; Have certain controversial before its gained Reviewers'Conclusions, its method also is not suitable for the test and the analysis of metal-base composites thermal fatigue property yet.
Summary of the invention
For overcoming hot fatigue performance test and the analysis of having only in the prior art steel, still lack test and analysis to the compound substance thermal fatigue property; The object of the present invention is to provide a kind of hot fatigue performance test of metal-base composites and the method for analysis, simulate the heat fatigue condition of material in the actual production truly, and carry out systematic Quantitative study and analysis by computing machine counterincision print image.
The present invention realizes through following technical proposal: the method for a kind of metal-base composites hot fatigue performance test and analysis comprises following process steps:
(1) the metal-base composites sample is cut into square, and the one side that will have base material and a composite bed is ground to the polishing attitude;
(2) step (1) gained sample is heat-treated to the sample intensification of fully being heated;
(3) step (2) gained high temperature sample is put into the water under the room temperature, make its Quench, simulate the chilling and shock heating operating mode with this to room temperature;
(4) the cooled sample of step (3) is polished,,, and crackle and composite bed taken pictures with the abrasive surface in the metallography microscope sem observation step (1) to remove surface scale;
(5) for several times step (2), (3), (4) repeatedly; Take a picture is carried out the quantitative analysis of crackle with the heat fatigue cracking image analysis system; Can analyze the mode of germinating of thermal fatigue failure mechanism and heat fatigue cracking and expansion, to realize the test and the analysis of metal-base composites thermal fatigue property.
The heat treatment temperature of said step (2) is 500～800 ℃, and heat treatment time is 5～10 minutes.
Compare with prior art, the present invention has following beneficial effect:
1, the present invention adopts heat-treatment furnace that water cooling under material heating mode and the room temperature is provided, and has simulated the condition of work of material generation heat fatigue in the actual production truly, and simple to operate, controllability is strong.
2, the present invention has adopted computer technology to carry out the system handles of crackle image, has avoided the error of artificial evaluation, has taken all factors into consideration the factor of the each side such as distribution, form of crackle simultaneously, makes the gained result more near actual.
3, the crackle quantitative analysis results that obtains promptly can be used for coming the thermal fatigue failure of lightening material under the chilling and shock heating operating mode through the actual operating conditions of control compound substance generation heat fatigue.
Description of drawings
Fig. 1 is the synoptic diagram of the square of cutting described in the step (1) of this method;
Fig. 2 is the heat fatigue cracking metallograph figure of the metal-base composites of embodiment 1;
Fig. 3 is the heat fatigue cracking metallograph figure of the metal-base composites of embodiment 2;
Fig. 4 is the crackle width figure that the computer measurement of embodiment 1 goes out.
Embodiment
Below through embodiment and combine accompanying drawing that the present invention is done further explain.
Embodiment 1
(1) with the tungsten carbide volume fraction be 20%, the high-carbon chromium iron volume fraction is that 80% Cr15 high chrome based composites sample cuts into square, and the one side that will have base material and a composite bed is ground to the polishing attitude;
(2) be to heat-treat under 600 ℃ 10 minutes step (1) gained sample in temperature, to the sample intensification of fully being heated;
(3) step (2) gained high temperature sample is put into the water under the room temperature, make its Quench, simulate the chilling and shock heating operating mode with this to room temperature;
(4) the cooled sample of step (3) is polished,,, and crackle and composite bed taken pictures with the abrasive surface in the metallography microscope sem observation step (1) to remove surface scale;
(5) 30 steps (2), (3), (4) repeatedly; With take a picture (as shown in Figure 3) carry out the quantitative analysis of crackle with the heat fatigue cracking image analysis system; Measure crackle width (as shown in Figure 5); Can analyze the mode of germinating of thermal fatigue failure mechanism and heat fatigue cracking and expansion, to realize the test and the analysis of metal-base composites thermal fatigue property.
By analysis means such as figure and combination XRD; Can draw because oxidation causes under the acting in conjunction of crisp, thermal stress and pulsating stress; Though crackle begins to germinate and constantly expansion and also increasing to some extent by the germinating of composite bed top and to the crackle of the base material direction expansion enhancing crackle width along with the thermal shock number of times, terminate in transversal crack in the expansion of specimen surface.
Embodiment 2
(1) with the tungsten carbide volume fraction be 40%, the high-carbon chromium iron volume fraction is that 60% Cr15 high chrome based composites sample cuts into square, and the one side that will have base material and a composite bed is ground to the polishing attitude;
(2) be to heat-treat under 800 ℃ 5 minutes step (1) gained sample in temperature, to the sample intensification of fully being heated;
(3) step (2) gained high temperature sample is put into the water under the room temperature, make its Quench, simulate the chilling and shock heating operating mode with this to room temperature;
(4) the cooled sample of step (3) is polished,,, and crackle and composite bed taken pictures with the abrasive surface in the metallography microscope sem observation step (1) to remove surface scale;
(5) 36 steps (2), (3), (4) repeatedly; With take a picture (as shown in Figure 4) carry out the quantitative analysis of crackle with the heat fatigue cracking image analysis system; Can analyze the mode of germinating of thermal fatigue failure mechanism and heat fatigue cracking and expansion, to realize the test and the analysis of metal-base composites thermal fatigue property.
Crackle appears in WC particle inside; Reflected that on the one hand WC has produced the loss that avalanche or efflorescence cause under the double action of stress and oxidation, also reflected on the other hand crackle also constantly to the granule interior expansion, this phenomenon sustainable development is gone down as if leaving; So at the oxidation of WC and crackle to granule interior constantly under the acting in conjunction of expansion; WC particle will integral body come off, thereby particulate reinforced composite is caused catastrophic destruction, makes the compound substance end-of-life.
Embodiment 3
(1) with the tungsten carbide volume fraction be 40%, the high-carbon chromium iron volume fraction is that 60% Cr15 high chrome based composites sample cuts into square, and the one side that will have base material and a composite bed is ground to the polishing attitude;
(2) be to heat-treat under 500 ℃ 8 minutes step (1) gained sample in temperature, to the sample intensification of fully being heated;
(3) step (2) gained high temperature sample is put into the water under the room temperature, make its Quench, simulate the chilling and shock heating operating mode with this to room temperature;
(4) the cooled sample of step (3) is polished,,, and crackle and composite bed taken pictures with the abrasive surface in the metallography microscope sem observation step (1) to remove surface scale;
(5) 40 steps (2), (3), (4) repeatedly; Take a picture is carried out the quantitative analysis of crackle with the heat fatigue cracking image analysis system; Can analyze the mode of germinating of thermal fatigue failure mechanism and heat fatigue cracking and expansion, to realize the test and the analysis of metal-base composites thermal fatigue property.
By thermal shock experiment, find that WC particle the most nearby at first ftractures apart from the interface, and bring out on every side matrix and prolong the interface direction and crack.Though the crackle of vertically being expanded by the composite bed top terminates in the transversal crack that traverses zone of transition; But nearly base material place WC particle has brought out the crackle to the expansion of interface vertical direction; The adding that WC particle is described sharply changes interface thermal expansivity on every side; Produce great thermal stress at this place when causing temperature shock, thereby be prone to the germinating crackle here.
Claims (2)
1. the method for metal-base composites hot fatigue performance test and analysis is characterized in that comprising following process steps:
(1) the metal-base composites sample is cut into square, and the one side that will have base material and a composite bed is ground to the polishing attitude;
(2) step (1) gained sample is heat-treated to the sample intensification of fully being heated;
(3) step (2) gained high temperature sample is put into the water under the room temperature, make its Quench to room temperature;
(4) the cooled sample of step (3) is polished,, and crackle and composite bed taken pictures with the abrasive surface in the metallography microscope sem observation step (1);
(5) for several times step (2), (3), (4) repeatedly; Take a picture is carried out the quantitative analysis of crackle with the heat fatigue cracking image analysis system; Can analyze the mode of germinating of thermal fatigue failure mechanism and heat fatigue cracking and expansion, to realize the test and the analysis of metal-base composites thermal fatigue property.
2. the method for metal-base composites hot fatigue performance test according to claim 1 and analysis is characterized in that: the heat treatment temperature of said step (2) is 500～800 ℃, and heat treatment time is 5～10 minutes.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043914A (en) * | 2015-07-21 | 2015-11-11 | 山东大学 | Test method and device for evaluating thermal fatigue of high-temperature alloy |
| CN106645140A (en) * | 2016-08-29 | 2017-05-10 | 内蒙古包钢钢联股份有限公司 | Method for determining steel crack source |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1546974A (en) * | 2003-12-09 | 2004-11-17 | 西北工业大学 | Aeroengine materials hot end environment experimental simulation method and device |
| CN102116724A (en) * | 2011-01-11 | 2011-07-06 | 中国第一汽车集团公司 | Test method for thermal fatigue property of cast iron material |
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- 2011-12-28 CN CN2011104450901A patent/CN102519818A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1546974A (en) * | 2003-12-09 | 2004-11-17 | 西北工业大学 | Aeroengine materials hot end environment experimental simulation method and device |
| CN102116724A (en) * | 2011-01-11 | 2011-07-06 | 中国第一汽车集团公司 | Test method for thermal fatigue property of cast iron material |
Non-Patent Citations (1)
| Title |
|---|
| 李祖来 等: "WC/铁基表面复合材料的热疲劳裂纹形成过程", 《复合材料学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043914A (en) * | 2015-07-21 | 2015-11-11 | 山东大学 | Test method and device for evaluating thermal fatigue of high-temperature alloy |
| CN106645140A (en) * | 2016-08-29 | 2017-05-10 | 内蒙古包钢钢联股份有限公司 | Method for determining steel crack source |
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Application publication date: 20120627 |