全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
材料工程  2010 

含Sc超高强铝合金热压缩时的流变行为和组织演变

Keywords: 含Sc超高强铝合金,热变形,流变软化,组织演变

Full-Text   Cite this paper   Add to My Lib

Abstract:

在Gleeble1500试验机上,对温度范围为380~470℃和应变速率范围为0.001~10s-1的一种新型含Sc的超高强铝合金的流变行为进行研究,并用金相观察和透射电镜分析考察压缩变形时的组织演变。结果显示,真应力-真应变曲线在小应变条件下(ε<0.15)表现出峰值应力及随后的动态流变特征,这种关系可以用Zener-Hollomon指数方程来描述。指数方程中的平均热变形激活能Q为157.9kJ/mol。变形试样中的亚结构由拉长后晶粒中的少量细小的等轴多边形亚晶粒和晶界上的锯齿状组织构成。动态流变主要是由动态回复(DRV)和动态再结晶(DRX)引起。

References

[1]  DESCHAMPS A,BRECHET Y.Influence of quench and heating rates on the ageing response of an Al-Zn-Mg-(Zr) alloy[J].Mater Sci Eng A,1998,251:200-207.
[2]  STILLER K,WARREN P J,HANSEN V,et al.Investigation of precipitation in an Al-Zn-Mg alloy after two-step ageing treatment at 100℃ and 150℃[J].Mater Sci Eng A,1999,270:55-63.
[3]  JAMES C,WILLIAMS J C,STARKE E A.Progress in structural materials for aerospace systems[J].Acta Mater,2003,51:5775-5799.
[4]  SHA G,CEREZO A.Characterisation of precipitates in an aged 7××× series alloy[J].Surf Interface Anal,2004,36:564-568.
[5]  黄兰萍,陈康华,郑子樵,等.微量Ag,Mg对Al-Cu-Li合金时效特性和显微组织的影响[J].稀有金属材料与工程,2005,34(8):1322-1325.
[6]  尹登峰,郑子樵,余志明.Sc对Al-Li-Cu-Mg-Ag-Zr合金组织和性能的影响[J].稀有金属材料与工程,2003,32(9):736-739.
[7]  HE Yong-dong,ZHANG Xin-ming,YOU Jiang-hai.Effect of minor Sc and Zr on microstructure and mechanical properties of Al-Zn-Mg-Cu alloy[J].Trans Nonferrous Met Soc,2006,16(5):1228-1235.
[8]  MCQUEEN H J,CELLIERS O C.Substructural influence in the hot rolling of Al alloys[J].Can Metal Quart,1997,36:73-86.
[9]  SPIGARELLI S,EVANGELISTA E,MCQUEEN H J.Study of hot workability of a heat treated AA6082 aluminum alloy[J].Scr Met Mater,2003,49(2):179-183.
[10]  MCQUEEN H J,XIA X,CUI Y,et al.Solution and precipitation effects on hot workability of 6201 alloy[J].Mater Sci Eng A,2001,319-321:420-424.
[11]  ZHANG H,LI L X,DENG Y A,et al.Hot deformation behavior of the new Al-Mg-Si-Cu aluminum alloy during compression at elevated temperatures[J].Mater Charact,2007,58(2):168-173.
[12]  吴文祥,孙得勤,曹春艳,等.5083铝合金热压缩变形流变应力行为[J].中国有色金属学报,2007,17(10):1667-1671.
[13]  林高用,张辉,郭武超,等.7075铝合金热压缩变形流变应力[J].中国有色金属学报,2001,11(3):412-415.
[14]  GEERTRUYDEN W V,MISIOLEK W Z,WANG P T.Grain structure evolution in a 6061 aluminum alloy during hot torsion[J].Mater Sci Eng A,2006,419:105-114.
[15]  SU J Q,NELSON T W,STERLING C J.Microstructure evolution during FSW/FSP of high strength aluminum alloys[J].Mater Sci Eng A,2005,405:277-286.
[16]  GOURDET S,MONTHEILLET F.An experimental study of the recrystallization mechanism during hot deformation of aluminum[J].Mater Sci Eng A,2000,283:274-288.
[17]  REN B,MORRIS J G.Microstructure and texture evolution of Al during hot and cold rolling[J].Metall and Mater Trans,1995,26(1):31-40.
[18]  HU H E,ZHEN L,YANG L,et al.Deformation behavior and microstructure evolution of 7050 aluminum alloy during high temperature deformation[J].Mater Sci Eng A,2008,488(1-2):64-71.
[19]  KENTARO I,YASUHIRO M.Dynamic recrystallization in Al-Mg-Sc alloys[J].Mater Sci Eng A,2004,387-389:647-650.
[20]  CHA J R,BAE W B,HWANG W J,et al.A study on the hot-deformation behavior and dynamic recrystallization of Al-5% Mg alloy[J].Mater Process,2001,118(1-3):356-361.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133