Influence of strain rate and temperature on tensile ductility of a multiphase Ni-25Al-15Cr intermetallic alloy

被引：2
|
作者：
Chen, RS
Guo, JT
Wang, SH
Zhou, JY
机构：
[1] Chinese Acad Sci, Inst Met Res, Shenyang 110015, Peoples R China
[2] Dalian Polytech Univ, Dept Mat Engn, Dalian 116023, Peoples R China
来源：
MATERIALS LETTERS | 1999年 / 39卷 / 04期
基金：
中国国家自然科学基金;
关键词：
multiphase NiAl-based alloy; intermetallics; BDTT; mechanical properties;
D O I：
10.1016/S0167-577X(99)00006-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure of a multiphase Ni60Al25Cr15 intermetallic alloy was examined by optical microscope and TEM. It is noticed that a single phase gamma' layer was sandwiched between NiAl and ductile gamma/gamma' phases. The observation of fracture surface suggested that a weak interface between brittle beta-NiAl and gamma' phase be responsible for its low ductility. It was also determined that the brittle-to-ductile transition for this material is sensitive to strain rate and associated with lattice diffusion in NiAl phase. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：200 / 205
页数：6
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