Modeling creep damage based on real microstructure

被引：0

作者：

Prawoto, Y. ^{[1
]}

Aizawa, T. ^{[2
]}

机构：

[1] NHK International Co., 50706 Varsity Court, Wixom, MI 48393., United States

[2] Research Center for Advanced Science and Technology (RCAST), University of Tokyo, 4-6-1 Komaba, Meguro-ku Tokyo 153-8904, Japan

来源：

Journal of Failure Analysis and Prevention | 2002年 / 2卷 / 06期

关键词：

Failure (mechanical) - Creep - Microstructure - Damage detection - Grain boundaries - Strain energy - Stiffness;

D O I：

10.1007/bf02715502

中图分类号：

学科分类号：

摘要：

This paper outlines a method to model creep failure of polycrystalline materials based on a real microstructure taken from an optical microscope. The creep failure is simulated in 304 stainless steel and the simulation is based on Norton's creep law. By treating the grain boundaries and the grains differently and adopting the void nucleation process proposed by Shewmon, the creep strain energy density can be used as a failure criterion. The result of the simulation confirmed the results of conventional methods used in a high-temperature remnant life assessment. The intermediate results of the simulation process allow calculation/monitoring of stiffnesses degradation as the material undergoes creep failure. © ASM International.

引用

页码：68 / 79

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