Microstructure and High Temperature Mechanical Property of Directionally Solidified NiAl-Cr(Mo)-W/Nb Alloy

被引：2

作者：

Qi, Yihui ^{[1
]}

Ma, Shengnan ^{[1
]}

Guo, Jianting ^{[2
]}

机构：

[1] Liaoning Univ Technol, Sch Mat Sci & Engn, Jinzhou 121001, Peoples R China

[2] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China

来源：

MATERIALS AND MANUFACTURING, PTS 1 AND 2 | 2011年 / 299-300卷

关键词：

NiAl; Directional solidification; Microstructure; Mechanical property; ROD-PLATE TRANSITION; IN-SITU COMPOSITES; CREEP-BEHAVIOR; NIAL-CR; FRACTURE; SYSTEMS;

D O I：

10.4028/www.scientific.net/AMR.299-300.167

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructure, high temperature tensile behavior of the DS NiAl-Cr(Mo)-W/Nb alloy have been investigated. The transverse microstructure of the alloy consists typically of eutectic colonies of NiAl and Cr(Mo) phase with white phases segregating at the cell boundaries. The white phase is possibly Cr(Mo) phase containing large amount of Nb and W elements. The longtitudinal microstructure of the alloy is lamellar with the direction basically parallel to the directional solidification direction. The tensile yield strength and ultimate strength of the DS NiAl-Cr(Mo)-W/Nb alloy are much higher than that of the general cast NiAl-Cr(Mo)-W/Nb alloy, and the elongation of the alloy is also higher than that of the general cast alloy. The fracture is debonding along phase boundary and cleavage.

引用

页码：167 / +

页数：2

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