On the role of crack tip creep deformation in hot compressive dwell fatigue crack growth acceleration in aluminum and nickel engine alloys

被引：3

作者：

Chen, Xiang ^{[1
]}

Pettit, Richard G. ^{[2
]}

Dudzinski, David ^{[3
]}

Lados, Diana A. ^{[1
]}

机构：

[1] Worcester Polytech Inst, Integrat Mat Design Ctr, 100 Inst Rd, Worcester, MA 01609 USA

[2] FractureLab LLC, 812 Signal Hill, Fruit Hts, UT 84037 USA

[3] Derivat Res Lab Inc, Ottawa, ON K1J 6E4, Canada

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2021年 / 145卷

关键词：

Compressive dwell; Creep-fatigue; Fatigue crack growth; Cast; 319; Al; Inconel; 718;

D O I：

10.1016/j.ijfatigue.2020.106082

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Ambient and Hot Compressive Dwell (HCD) fatigue experiments were carried out to understand the effects of HCD on the fatigue crack growth behavior of cast 319 Al and Inconel 718 engine alloys. HCD was found to reduce endurance and increase rates of crack growth at engine service temperatures, while far less crack growth acceleration was found at room temperature. A fracture mechanics-based model was developed, considering tensile residual stress contributions due to compressive creep in order to predict crack growth with HCD. Good agreement was found between predictions and experimental results.

引用

页数：13

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