Crack-tip stress-strain fields in single crystal nickel-base superalloys at high temperature under cyclic loading

被引：39

作者：

Marchal, N. ^{[1
]}

Flouriot, S. ^{[1
]}

Forest, S. ^{[1
]}

Remy, L. ^{[1
]}

机构：

[1] Ecole Natl Super Mines, UMR 7633, ARMINES, Ctr Mat,CNRS, F-91003 Evry, France

来源：

COMPUTATIONAL MATERIALS SCIENCE | 2006年 / 37卷 / 1-2期

关键词：

crack; single crystal; superalloy; creep-fatigue; stress-strain field; high temperature;

D O I：

10.1016/j.commatsci.2005.12.014

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This work is related to life prediction of high-pressure single crystal turbine blades. Stress and strain fields are first analysed at the tip of a static crack subjected to creep-fatigue loading, assuming an elasto-viscoplastic single crystal behaviour model. Local ratchetting effects are observed, depending on the distance from the crack-tip. Creep-fatigue loadings are compared with pure fatigue and pure creep loadings. The significant differences are pointed out, especially stress relaxation and amount of plastic slip. These results will be useful for the development of a new life prediction tool, based on local approach to fracture. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：42 / 50

页数：9

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