Thermal-mechanical fatigue behavior of a cast K417 nickel-based superalloy

被引：35

作者：

Liu, F ^{[1
]}

Ai, SH ^{[1
]}

Wang, YC ^{[1
]}

Zhang, H ^{[1
]}

Wang, ZG ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, ShenYang Natl Lab Mat Sci, Shenyang 110016, Peoples R China

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2002年 / 24卷 / 08期

关键词：

superalloy; thermal-mechanical fatigue; flow stress; fatigue life;

D O I：

10.1016/S0142-1123(02)00010-5

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The thermal-mechanical fatigue (TMF) behavior of cast K417 nickel-based superalloy was investigated under in-phase (IP) and out-of-phase (OP) loading in the temperature range from 400 to 850degreesC. The results revealed that the tendency to cyclic hardening Under thermal-mechanical and isothermal fatigue was higher than that Under static tensile testing at 850degreesC. Isothermal fatigue (IF) was observed to cause higher cyclic flow stress than TMF. At a corresponding strain amplitude, the thermal-mechanical fatigue life was lower than that of isothermal fatigue, and the TMF life of out-of-phase cycling was higher than that of in-phase cycling Scanning electron microscopic observations of fracture surfaces and longitudinal sections revealed intergranular-fatigue under in-phase TMF which led to the decrease in fatigue life. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：841 / 846

页数：6

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