Superplastic deformation behavior of a spray-deposited eutectic NiAl/Cr(Mo) alloy doped with Dy

被引：0

作者：

Du, Xinghao

Wu, Baolin

Huang, J. C. ^{[1
]}

机构：

[1] Natl Sun Yat Sen Univ, Ctr Nanosci & Nanotechnol, Inst Mat Sci & Engn, Kaohsiung 804, Taiwan

[2] Shenyang Inst Aeronaut Engn, Dept Mat Engn, Shenyang, Peoples R China

来源：

INTERNATIONAL JOURNAL OF MATERIALS RESEARCH | 2007年 / 98卷 / 02期

关键词：

spray forming; Ni-28Cr-6Mo (Dy) alloy; superplasticity; grain boundary sliding;

D O I：

10.3139/146.101449

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The tensile deformation behavior at elevated temperatures and the associated mechanisms are investigated for hot isostatically pressed NiAl-28Cr-5.9MO-0.1Dy fabricated through spray forming. Superplasticity is observed at above 1323 K under an initial strain rate lower than 10(-3) s(-1) with an m value of 0.5. The activation energies for superplastic flow are found to be half of that for self-diffusion in NiAl. Grain boundary sliding between NiAl and adjacent NiAl or Cr(Mo) grains with local range accommodation, i. e., dynamic recovery, is suggested to be responsible for the superplastic deformation of the alloy.

引用

页码：123 / 127

页数：5

共 19 条

[1] Superplasticity of a multiphase Ni-25Al-25Cr intermetallic alloy [J].