Effect of various niobium additions on microstructure and mechanical behavior of a NiAl-Cr-Mo eutectic alloy

被引：0
|
作者：
Huai, KW
Guo, JT
Gao, Q
Yang, R
机构：
[1] Chinese Acad Sci, Superalloys Div, Inst Met Res, Shenyang 110016, Peoples R China
[2] Dalian Univ Technol, Dept Mat Engn, Dalian 116024, Peoples R China
来源：
ZEITSCHRIFT FUR METALLKUNDE | 2006年 / 97卷 / 01期
关键词：
NiAl-28Cr-6Mo; Nb(Cr1-x-yNixAly)(2) phase; microstructure; mechanical properties;
D O I：
暂无
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The microstructure and compressive behavior of the NiAl-28Cr-6Mo alloy doped with various amounts of Nb have been investigated. The results show that the microstructure of all Nb-doped alloys mainly consists of three phases, viz. the gray lamellar Cr(Mo) plate, the black NiAl matrix, and Cr2Nb with C14-structure-type 1 Laves phase semicontinuously distributed at the cell boundary. All Nb-doped alloys exhibit relatively good room-temperature compressive ductility and higher yield strength at all temperatures compared to the NiAl-28Cr-6Mo eutectic alloy due to the presence of Laves phase. It is found that the NiAl-28Cr-6Mo alloy doped with 1 at.% Nb attains the optimum concerning high temperature strength and room temperature ductility.
引用
收藏
页码：59 / 63
页数：5
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