Continuum Damage Mechanics Modeling of Creep in DS GTD-111™ Superalloy

被引：1

作者：

Sondhi, Sanjay Kumar ^{[1
]}

Singh, Gaurav ^{[1
]}

Mastromatteo, Francesco ^{[2
]}

机构：

[1] GE Global Res Ctr, Mat Res Lab, Bangalore, Karnataka, India

[2] GE Oil & Gas Nuovo Pignone, Florence, Italy

来源：

EURO SUPERALLOYS 2010 | 2011年 / 278卷

关键词：

Superalloy; Creep model; Continuum Damage Mechanics; GTD-111;

D O I：

10.4028/www.scientific.net/AMR.278.234

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Safe extrapolation of short-term creep data requires development of creep models where (a) the constitutive laws are physics based, and (b) majority of model parameters are calculated rather than empirically fitted. This paper details the structure of such a physics-based creep model and its application to DS GTD-111 (TM) superalloy. The constitutive creep law is derived from the kinetics of dislocation-particle interactions in the presence of thermal activation. This constitutive creep law is further coupled with the evolution kinetics of controlling microstructural parameters and associated damages. The model is expected to provide vital inputs for component design as well as remaining life assessment. (GTD-111 (TM) is a trademark of the General Electric Company).

引用

页码：234 / +

页数：2

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