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

页码：200 / 205

页数：6

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