|
|
HOT DEFMATION BEHAVIOR AND HOT WORKABILITY OF Mg-Zn-Zr-Ce ALLOY |
YU Hui1, 2), KIM Youngmin2), YU Huashun1), YOU Bongsun2), MIN Guanghui1) |
1) Key Laboratory for Liquid--Solid Evolution and Processing of Materials of Ministry of Education, School of Materials Science and Engineering, Shandong University, Jinan 250061
2) ALMG research group, Light metal division, Korea Institute of Materials Science, Changwon 642831, Republic of Korea |
|
Cite this article:
YU Hui KIM Youngmin YU Huashun YOU Bongsun MIN Guanghui. HOT DEFMATION BEHAVIOR AND HOT WORKABILITY OF Mg-Zn-Zr-Ce ALLOY. Acta Metall Sin, 2012, 48(9): 1123-1131.
|
Abstract The hot deformation behavior of the T4-treated Mg-6Zn-0.5Zr-0.5Ce alloy was investigated by compressive test using Gleeble 3800 thermal--simulator in the temperature range of 523-673 Kand strain rate range of 0.001-1.0 s-1. The results show that the flow stress is significantly affected by both deformation temperature and strain rate. The flow stress increases with either decreasing deformation temperature or increasing strain rate. The flow stress value tends to be constant after a peak value appearing at high deformation temperature and low strain rate. In the present work, the average activation energy for the hot deformation has been determinded to be 145.76 kJ/mol using the hyperbolic sine constitutive equation. A feed-forward back-propagation artificial neural network (ANN) has been established and used to investigate the flow behaviors of the alloy. The predicted data by the ANN is in good agreement with the experimental ones. Combing microstructure observation, the processing map for this alloy established on the basis of a dynamic material model indicates that the dynamic recrystallization (DRX) would take place in the range of 648-673 K and 0.1-1.0 s-1, while under the same strain rate the flow instability would occur due to mechanical twinning when the temperature below 573 K. The formation of interfaces depends on the process of mechanical recovery caused by cross-slip of screw dislocations. The DRX model indicates that DRX of this alloy is controlled by interface migration.
|
Received: 28 February 2012
|
|
Fund: Supported by Fund of China Scholarship Council (No.2010622106) and the World Premier Materials Program funded by The Ministry of Knowledge Economy, Republic of Korea (No.PMI7300) |
[1] Luo A A, Mishra R K, Sachdev A K. Scr Mater, 2011; 64: 410[2] Yu K, LiWX, Zhao J,Ma Z Q, Wang R. Scr Mater, 2003; 48: 1319[3] Qin Y J, Pan Q L, He Y B, LiWB, Liu X Y, Fan X. Acta Metall Sin, 2009; 45: 887(覃银江, 潘清林, 何运斌, 李文斌, 刘晓艳, 范曦. 金属学报, 2009; 45: 887)[4] Wang Z X, Liu X F, Xie J X. Acta Metall Sin, 2008; 44: 1378(王智祥, 刘雪峰, 谢建新. 金属学报, 2008; 44: 1378)[5] Tang W N, Chen R S, Han E H. Acta Metall Sin, 2006; 42: 1096(唐伟能, 陈荣石, 韩恩厚. 金属学报, 2006; 42: 1096)[6] Mishra R K, Gupta A K, Rao P R, Sachdev A K, Kumar A M, Luo A A. Scr Mater, 2008; 59: 562[7] Chino Y, Kado M, Mabuchi M. Acta Mater, 2008; 56: 387[8] Zhou H T, Zeng X Q, Liu L F, Zhang Y, Zhu Y P, Ding W J. J Mater Sci, 2004; 39: 7061[9] Xia C Q, Wang Y N, Wu A R, Gu Y. J Cent South Univ Technol, 2005; 12: 515[10] Luo Z P, Song D Y, Zhang S Q. J Alloys Compd, 1995; 230: 109[11] Zhao K Y, Peng X D, Xie W D, Wei Q Y, Yang Y, Wei G B. Trans Nonferrous Met Soc China, 2010; 20(suppl): s324[12] Ma C, Liu M, Wu G, Ding W, Zhu Y. Mater Sci Eng, 2003; A349: 207[13] Zhang D F, Qi F G, Lan W, Shi G L, Zhao X B. Trans Nonferrous Met Soc China, 2011; 21: 703[14] Fan Y, Wu G H, Zhai C Q. Mater Sci Eng, 2006; A433: 208[15] Qin Y J, Pan Q L, He Y B, Li W B, Liu X Y, Fan X. Mater Manuf Process, 2010; 25: 539[16] Chun M S, Biglou J, Lenard J G, Kim J G. J Mater Process Technol, 1998; 86: 245[17] Reddy N S, Lee Y H, Park C H, Lee C S. Mater Sci Eng, 2008; A492: 276[18] Bariani P F, Bruschi S, Negro T D. J Mater Process Technol, 2004; 152: 395[19] Bahrami A, Anijdan S H M, Hosseini H R M, Shafyei A, Narimani R. Comput Mater Sci, 2005; 34: 335[20] Chen Z Y, Li Z Q, Yu C. Mater Sci Eng, 2011; A528: 961[21] Peng W P, Li P J, Zeng P, Lei L P. Mater Sci Eng, 2008; A494: 173[22] Poletti C, Dieringa H, Warchomicka F. Mater Sci Eng, 2009; A516: 138[23] Prasad Y V R K. J Mater Eng Perform, 2003; 12: 638[24] Slooff F A, Dzwonczyk J S, Zhou J, Duszczyk J, Katgerman L. Mater Sci Eng, 2010; A527: 735[25] Wang C Y, Wang X J, Chang H, Wu K, ZhengMY. Mater Sci Eng, 2007; A464: 52[26] Wang Y, Zhang Y, Zeng X, Ding W. J Mater Sci, 2006; 41: 3603[27] Zhou H T, Li Q B, Zhao Z K, Liu Z C,Wen S F, Wang Q D. Mater Sci Eng, 2010; A527: 2022[28] Poliak E I, Jonas J J. Acta Mater, 1996; 44: 127[29] McQueen H J, Ryan N D. Mater Sci Eng, 2002; A322: 43[30] Deng Y, Yin Z M, Huang J W. Mater Sci Eng, 2011; A528: 1780[31] Galiyev A, Kaibyshev R, Gottstein G. Acta Mater, 2001; 49: 1199[32] Ma M L, Zhang K, Li X G, Li Y J, Zhang K. Trans Nonferrous Met Soc, 2008; 18(Suppl): s132[33] Zhu Y C, Zeng W D, Sun Y, Feng F, Zhou Y G. Comput Mater Sci, 2011; 50: 1785[34] Ju Q, Li D G, Liu G Q. Acta Metall Sin, 2006; 42: 218(鞠 \ \ 泉, 李殿国, 刘国权. 金属学报, 2006; 42: 218)[35] Ravichandran N. J Mater Eng Perform, 2003; 12: 653[36] Derby B. Scr Metall Mater, 1992; 27: 1581 |
No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
|
Shared |
|
|
|
|
|
Discussed |
|
|
|
|