Fatigue crack propagation behaviour of a nickel based superalloy at elevated temperatures

被引：2

作者：

Wang, L. ^{[1
]}

Huang, X. ^{[1
]}

Guo, G. ^{[1
]}

Hu, Y. ^{[2
]}

Zhang, L. ^{[1
]}

机构：

[1] ZHONGHANG Testing Innovat Cooperat, AVIC Beijing Inst Aeronaut Mat, Sci & Technol Adv High Temp Struct Mat Lab, Beijing Key Lab Aeronaut Mat Testing & Evaluat, Beijing 100095, Peoples R China

[2] MTS Syst Corp, Eden Prairie, MN 55344 USA

来源：

MATERIALS RESEARCH INNOVATIONS | 2014年 / 18卷

关键词：

Fatigue crack growth; Superalloy; Elevated temperature; Oxidation; Crack closure; GROWTH;

D O I：

10.1179/1432891714Z.000000000863

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The fatigue crack growth behaviour of a nickel based superalloy at elevated temperatures 550, 650 and 710 degrees C was studied. The direct current potential drop (DCPD) technique was used to measure the crack length during the test. It was found that the crack growth rates slightly increased with increasing temperatures, but the temperature effect on crack growth rates was less pronounced at higher Delta K ranges. At the same temperature the crack growth rates increased with increasing load ratios. The oxidation induced crack closure is considered to be a reason of the observed crack growth behaviour in this study.

引用

页码：1087 / 1090

页数：4

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