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| Dynamic Precipitation of 7050 Al Alloy on the Different Deformation Temperature |
| LANG Yujing1, CUI Hua2, CAI Yuanhua1, ZHANG Jishan1 |
1.State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083
2. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083 |
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Cite this article:
LANG Yujing CUI Hua CAI Yuanhua ZHANG Jishan. Dynamic Precipitation of 7050 Al Alloy on the Different Deformation Temperature. Chin J Mater Res, 2012, 26(2): 143-148.
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Abstract Dynamic precipitation of 7050 Al alloy on the different deformation temperature was investigated. The results show that dynamic precipitation of MgZn2 phases can not affect the jagged fluctuations of the true stress-strain curves, and the deformation accelerated the dynamic precipitation. With increasing of deformation temperature, partial spherical precipitates become to rod-like precipitates, and the size of the precipitates increased while the quantity reduced. Large rod-like MgZn2 precipitates are fragmented during the deformation at 450 ℃. Simultaneity, the density of the dislocation also decreased, and the dislocation cells transform into the discrete dislocation. The precipitates pin the dislocations and prevent the grain boundary impingement. The precipitates have mainly the metastable η phase and
equilibrium η phase, and can not induce the micro-crack.
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Received: 25 August 2011
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| Fund: Supported by State Key Laboratory of Advanced Metals and Materials of China No.2008Z-13. |
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