Effect of microstructure on high temperature mechanical properties in forming Ni-20Cr-10Mo-10Co superalloy

被引：0

作者：

Gu, JL ^{[1
]}

Guo, YH

Jia, CL

Shi, HJ

机构：

[1] Tsing Hua Univ, Sch Mat Sci & Engn, Beijing 100084, Peoples R China

[2] Beijing Met Res Inst, Beijing 100085, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2003年 / 32卷 / 02期

关键词：

superalloy; rupture life; creep; grain-size; interdendritic spacing; microstructure;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ni-20Cr-10Mo-10Co superalloy is a casting superalloy strenghted by carbides. With mold temperature dropping the grain-size and interdendritic space of alloy decrease. At the working temperature of 800 degreesC, the type of carbides was changed. In addition, it was shown that rupture life capability and creep capability of the alloy under the condition of 800 degreesC and 165MPa have been improved with mold temperature dropping. The fracture of rupture tensile sample is pseudo-cleavage transcrystalline fracture. It is demonstrate that isochronal-strength temperature of the material is over 800 degreesC, therefore, the grain-size and interdendritic refined lead to improve high temperature mechanical properties.

引用

页码：103 / 107

页数：5