均匀化态Mg-Gd-Y-Zn-Mn合金热变形行为及加工图（英文）
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摘要
通过温度在350~500℃,应变速率在0.001~1 s~(-1)的热压缩试验,研究了均匀化态Mg-Gd-Y-Zn-Mn合金热变形行为和加工图。采用双曲线模型,建立了本构方程,计算的激活能为260.94 kJ/mol。基于动态材料模型,绘制了应变量为0.6,1.2的均匀化态Mg-Gd-Y-Zn-Mn合金的加工图,用于研究材料的热成型性能。应变量为1.2的加工图显示适合合金加工的两个安全区域:一个是变形温度460~500℃,应变速率0.001~1 s~(-1);另一个是变形温度350~500℃,应变速率0.001~0.005 s~(-1)。同时,讨论了相应的微观组织演变,重点关注了该合金中长程堆垛有序相(LPSO)的变形机制。
The hot deformation behavior and processing maps of as-homogenized Mg-Gd-Y-Zn-Mn alloy were investigated by hot compression tests performed at 350~500 ℃ and strain rates ranging from 0.001 s~(-1) to 1 s~(-1). The constitutive equation was established using hyperbolic law, and the activation energy of the alloy was calculated to be about 260.94 kJ/mol. Based on the dynamic material model, processing maps of as-homogenized Mg-Gd-Y-Zn-Mn alloy deformed at strain values of 0.6, 1.2 were drawn to study the hot workability of the alloy. The processing map developed at a strain of 1.2 shows two safety domains: one occurring at 460~500 ℃ and strain rates ranging from 0.001 s~(-1) to 1 s~(-1); the other occurring at 350~500 ℃, and strain rate ranging from 0.001 s~(-1) to 0.005 s~(-1). The corresponding microstructure evolution, with particular emphasis on the deformation mechanism of long-period stacking ordered phase(LPSO) in this alloy, was also discussed.
The hot deformation behavior and processing maps of as-homogenized Mg-Gd-Y-Zn-Mn alloy were investigated by hot compression tests performed at 350~500 ℃ and strain rates ranging from 0.001 s~(-1) to 1 s~(-1). The constitutive equation was established using hyperbolic law, and the activation energy of the alloy was calculated to be about 260.94 kJ/mol. Based on the dynamic material model, processing maps of as-homogenized Mg-Gd-Y-Zn-Mn alloy deformed at strain values of 0.6, 1.2 were drawn to study the hot workability of the alloy. The processing map developed at a strain of 1.2 shows two safety domains: one occurring at 460~500 ℃ and strain rates ranging from 0.001 s~(-1) to 1 s~(-1); the other occurring at 350~500 ℃, and strain rate ranging from 0.001 s~(-1) to 0.005 s~(-1). The corresponding microstructure evolution, with particular emphasis on the deformation mechanism of long-period stacking ordered phase(LPSO) in this alloy, was also discussed.
引文
[1] Wang J,Meng J,Zhang D et al.Materials Science and Engineering A[J],2007,456(1-2):78
2 Wang C Y,Wang X J,Chang H et al.Materials Science and Engineering A[J],2007,464(1-2):52
3 Hu H E,Wang X Y,Deng L.Materials Science and Technology[J],2014,30(11):1321
4 Prasad B K,Narayan S P,Modi O P et al.Materials Science&Technology[J],2011,27(11):1639
5 Li H Z,Wang H J,Li Z et al.Materials Science and Engineering A[J],2010,528(1):154
6 Tahreen N,Zhang D F,Pan F S et al.Journal of Alloys and Compounds[J],2015,644:814
7 Honma T,Ohkubo T,Kamado S et al.Acta Materialia[J],2007,55(12):4137
8 Fang X Y,Yi D Q,Nie J F et al.Journal of Alloys and Compounds[J],2009,470(1-2):311
9 Wang J,Song P,Huang S et al.Materials Letters[J],2013,93:415
10 Datta A,Waghmare U V,Ramamurty U.Acta Materialia[J],2008,56(11):2531
11 Ryan N D,Mc Queen H J.Materials Science and Engineering A[J],2002,322:43
12 Huang X,Zhang H,Han Y et al.Materials Science and Engineering A[J],2010,527(3):485
13 Chen Q,Xia X,Yuan B et al.Materials Science and Engineering A[J],2014,593:38
14 Kwak T Y,Lim H K,Kim W J.Journal of Alloys and Compounds[J],2015,644:645
15 Prasad Y V R K,Rao K P.Materials Science and Engineering A[J],2005,391(1-2):141
16 Prasad Y V R K,Rao K P,Hort N et al.Materials Science and Engineering A[J],2009,502(1-2):25
17 Lin Y C,Li L T,Xia Y C et al.Journal of Alloys and Compounds[J],2013,550:438
18 Shao Z,Zhu X,Wang R et al.Materials&Design[J],2013,51:826
19 Kim J K,Sandl?bes S,Raabe D.Acta Materialia[J],2015,82:414
20 Shao X H,Yang Z Q,Ma X L.Acta Materialia[J],2010,58(14):4760
21 Hagihara K,Yokotani N,Umakoshi Y.Intermetallics[J],2010,18(2):267
22 Huang S,Wang J,Hou F et al.Materials Science and Engineering A[J],2014,612:363
2 Wang C Y,Wang X J,Chang H et al.Materials Science and Engineering A[J],2007,464(1-2):52
3 Hu H E,Wang X Y,Deng L.Materials Science and Technology[J],2014,30(11):1321
4 Prasad B K,Narayan S P,Modi O P et al.Materials Science&Technology[J],2011,27(11):1639
5 Li H Z,Wang H J,Li Z et al.Materials Science and Engineering A[J],2010,528(1):154
6 Tahreen N,Zhang D F,Pan F S et al.Journal of Alloys and Compounds[J],2015,644:814
7 Honma T,Ohkubo T,Kamado S et al.Acta Materialia[J],2007,55(12):4137
8 Fang X Y,Yi D Q,Nie J F et al.Journal of Alloys and Compounds[J],2009,470(1-2):311
9 Wang J,Song P,Huang S et al.Materials Letters[J],2013,93:415
10 Datta A,Waghmare U V,Ramamurty U.Acta Materialia[J],2008,56(11):2531
11 Ryan N D,Mc Queen H J.Materials Science and Engineering A[J],2002,322:43
12 Huang X,Zhang H,Han Y et al.Materials Science and Engineering A[J],2010,527(3):485
13 Chen Q,Xia X,Yuan B et al.Materials Science and Engineering A[J],2014,593:38
14 Kwak T Y,Lim H K,Kim W J.Journal of Alloys and Compounds[J],2015,644:645
15 Prasad Y V R K,Rao K P.Materials Science and Engineering A[J],2005,391(1-2):141
16 Prasad Y V R K,Rao K P,Hort N et al.Materials Science and Engineering A[J],2009,502(1-2):25
17 Lin Y C,Li L T,Xia Y C et al.Journal of Alloys and Compounds[J],2013,550:438
18 Shao Z,Zhu X,Wang R et al.Materials&Design[J],2013,51:826
19 Kim J K,Sandl?bes S,Raabe D.Acta Materialia[J],2015,82:414
20 Shao X H,Yang Z Q,Ma X L.Acta Materialia[J],2010,58(14):4760
21 Hagihara K,Yokotani N,Umakoshi Y.Intermetallics[J],2010,18(2):267
22 Huang S,Wang J,Hou F et al.Materials Science and Engineering A[J],2014,612:363