Cyclic deformation behavior of a nickel-base superalloy under fatigue loading

被引：76

作者：

Zhang, Peng ^{[1
]}

Zhu, Qiang ^{[1
]}

Hu, Chao ^{[1
]}

Wang, Chuan-jie ^{[1
]}

Chen, Gang ^{[1
]}

Qin, He-yong ^{[2
]}

机构：

[1] Harbin Inst Technol Weihai, Sch Mat Sci & Engn, Weihai 264209, Peoples R China

[2] Cent Iron & Steel Res Inst, Beijing 100081, Peoples R China

来源：

MATERIALS & DESIGN | 2015年 / 69卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Low cycle fatigue; Cyclic deformation behaviors; Fracture morphology; Dislocation characteristics; HIGH-TEMPERATURE; ELEVATED-TEMPERATURE; INCONEL; 718; ALLOYS; GROWTH; MORPHOLOGY; CREEP;

D O I：

10.1016/j.matdes.2014.12.047

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Total strain-controlled low cycle fatigue (LCF) tests of a nickel-base superalloy were performed at 650 degrees C. Combined with fatigue test data, cyclic deformation behaviors of the alloy were analyzed. Fatigue cycle life decreases significantly with the increasing total strain amplitude. The cyclic hardening and cyclic softening phenomena occur during the LCF process, which are associated with the total strain amplitude. Fracture morphologies and dislocation characteristics were observed through scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The combined effects of brittle fracture and ductile fracture are the main LCF fracture mechanism of the alloy. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：12 / 21

页数：10

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