Evaluation of the influences of the stress ratio, temperatures, and local microstructure on small fatigue crack propagation behavior of the FGH96 superalloy

被引：14

作者：

Liu, A. ^{[1
]}

Zhang, Y. T. ^{[1
]}

Wang, X. S. ^{[1
]}

Xu, W. ^{[2
]}

Zhang, Y. ^{[2
]}

He, Y. H. ^{[2
]}

机构：

[1] Tsinghua Univ, Dept Engn Mech, Beijing 100084, Peoples R China

[2] AECC Beijing Inst Aeronaut Mat, Beijing Key Lab Aeronaut Mat Testing & Evaluat, Beijing 100095, Peoples R China

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2023年 / 171卷

关键词：

Nickel-based powder metallurgy; Stress ratio; Small fatigue crack propagation behavior; In-situ SEM technology; Kitagawa -Takahashi diagram; POWDER-METALLURGY SUPERALLOY; NICKEL-BASED SUPERALLOY; GROWTH-BEHAVIOR; DEFORMATION-BEHAVIOR; INITIATION; PREDICTION; ALLOY; INCLUSION;

D O I：

10.1016/j.ijfatigue.2023.107573

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Here, the influences of the stress ratios, temperatures, and local microstructure on the propagation behavior of small fatigue crack for FGH96 superalloy are quantitatively investigated. Following an increase in the stress ratio and temperature, the small fatigue crack growth rates increased. The influences of the local microstructure on the restrained ability for small fatigue crack propagation are analyzed, and the critical stress range of small fatigue crack propagation for the FGH96 superalloy at different stress ratios is proposed based on an amendatory-threedimensional Kitagawa-Takahashi diagram. These results can aid in the fatigue damage tolerance design of FGH96 superalloy components.

引用

页数：12

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