|
Cite this article:
. . Acta Metall Sin, 2007, 43(10): 1053-1058 .
|
|
|
Abstract The hot compression testing of spray formed plus hot isostatic pressing (HIPing) GH742y superalloy was conducted by Gleeble-1500D thermal mechanical simulator at testing temperatures in the range of 1050℃ to 1140℃, and strain rates in the range of 0.01 s-1~10.0s-1 with engineering strain 50%. The processing map and activation energy map of alloy were established by testing data, and microstructure evolution of deformed samples was also examined. The results show that the grain size of spray formed alloy does not significantly increase after HIPing. Due to the variation of dislocation movement and density in deformation, the yield drop was observed, but without yield drop at low deforming temperature. Processing map and activation energy map obtained at the strain of 0.69 indicate that the instability domain is observed at the temperature of 1050℃～1110℃ and strain rate of 0.01s-1, and the highest efficiency of power dissipation (η) is obtained at the temperature of 1110℃~1140℃ and the strain rate of 1.0 s-1~10.0s-1, and platform region was also observed at the temperature of 1140℃ and the strain rate of 1.0~10.0s-1. So, the optimum conditions for thermomechanical processing correspond to the η maximum region and activation energy platform region. The full dynamic recrystallization (DRX) microstructure occurred at the optimum condition.
|
|
Received: 27 December 2006
|
|
|
[1]Zhang G Q,Li Z,Tian S F,Yan M G.J Aeronaut Mater, 2006;26(3):258 (张国庆，李周，田世藩，颜明皋．航空材料学报，2006；26(3)：258)
[2]Lavernia E J,Grant N J.Mater Sci Eng,1988;98A:381
[3]Kum D W,Frommeyer G,Grant N J.Metall Trans,1987; 18A:1703
[4]Brichnell Rodger H.Metall Trans,1986;17A:583
[5]Grant P S.Prog Mater Sci,1995;39:497
[6]Grant P S,Cantor B,Katgerman L.Acta Metall Mater, 1993;41(11):3097
[7]Singer A R E.Int J Powder Metall Powder Technol,1985; 21(3):219
[8]Lawley A,Apelian D.Powder Met,1994;37(2):123
[9]Li Z,Zhang G Q,Zhang Z H,Liu Z W.J Aeronaut Mater, 2000;20(3):68 (李周，张国庆，张智慧，刘仲武．航空材料学报，2000；20(3)：68)
[10]Sun J F,Shen J,Cao F Y,Li Q C.Spec Cast Nonferrous Alloy,2002;4:9 (孙剑飞，沈军，曹福洋，李庆春．特种铸造及有色合金，2002；4：9)
[11]Tian S F,Li Z,Zhao X G,Liang Z K,Ren L P,Mi G F, Yan M G.In:Ellerington P ed.,Proc 3rd Int Conf Spray Forming,Cardiff,UK:Osprey Metals Ltd.,1996:65
[12]Sun J F,Shen 3,Cao F Y,Li Q C.Powder Metall Technol, 2002;20(3):151 (孙剑飞，沈军，曹福洋，李庆春．粉末冶金技术，2002；20(3)：151)
[13]Li Z,Zhang G Q,Zhang Z H,Tian S F.Acta Metall Sin (Engl Lett),2004;17:205
[14]Fielder H C,Sawyer T F,Kopp R W.J Met,1987;39(8): 28
[15]Dunlavy M A,Shivpuri R,Semiatin S L.Mater Sci Eng, 2003;A395:210
[16]Kang F W,Zhang G Q,Li Z,Sun J F.Chin J Rare Met, 2005;29:609 (康福伟，张国庆，李周，孙剑飞．稀有金属，2005；29：609)
[17]Xu W Y,Li Z,Zhang G Q,Yuan H.J Aeronaut Mater, 2006;26(3):52 (徐文勇，李周，张国庆，原华．航空材料学报，2006；26(3)：52)
[18]Zhang B J,Zhao G P,Jiao L Y,Xu G H,Qin H Y,Feng D.Acta Metall Sin.2005;41:351 (张北江，赵光普，焦兰英，胥国华，秦鹤勇，冯涤．金属学报，2005；41：351)
[19]Srinivasan N,Prassd Y V R K.J Mater Proc Technol, 1995;51:171
[20]Gronostajski Z.J Mater Process Technol,2002; 9(125/126):119
[21]Medeiros S C,Frazier W G,Prasad Y V R K.Metall Mater Trans,2000;31A:2317 |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
