Experimental investigation on low cycle fatigue properties of Ni-based alloy with single hole

被引：3

作者：

Li, Zhenwei ^{[1
]}

Gao, Hangshan ^{[1
]}

Wang, Zhaohan ^{[1
]}

Zhao, Yanchao ^{[1
]}

Wen, Zhixun ^{[1
]}

Yue, Zhufeng ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Sch Mech Civil Engn & Architecture, Xian 710072, Peoples R China

来源：

INTERNATIONAL JOURNAL OF MATERIALS RESEARCH | 2020年 / 111卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Ni-based superalloy; Low cycle fatigue; Film cooling hole; Failure mechanism; FILM-COOLING HOLES; CRYSTAL SUPERALLOY; TEMPERATURE; BEHAVIOR;

D O I：

10.3139/146.111904

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The low-cycle fatigue properties of the Ni-based superalloy K416B with single film cooling hole were investigated. The low-cycle fatigue tests were carried out using tension cycling under stress-controlled conditions (stress ratio R = 0.1) at room temperature. The fatigue limit lives of the perforated samples were determined by the lifting method. The fracture morphologies and microstructural evolution were examined. The results showed that the fatigue crack initiated from the film cooling hole. Furthermore, fracture paths and surface morphologies of the samples were influenced significantly by the stress level. The analysis of the microstructural evolution further indicated that the fatigue failure mechanisms of the samples with a film cooling hole depended on the stress level.

引用

页码：519 / 525

页数：7

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