Constitutive equations of the minimum creep rate for 9% Cr heat resistant steels

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	Constitutive equations of the minimum creep rate for 9% Cr heat resistant steels
	Y. X. Chen; W. Yan; W. Wang; Y. Y. Shan; K. Yang
	2012
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	534 页码:649-653
摘要	This study addresses the overestimation of the time-temperature-parameter (TTP) method on the allowable creep strength of 9-12% Cr heat resistant steels. Creep data of 9% Cr heat resistant steels are divided into several data sets according to the creep controlling mechanism. Constitutive equations of the minimum creep rate (epsilon)over dot(m) depending on applied stress sigma and temperature T have been constructed, and the modeling results are found to be well in agreement with the experimental data. The influence of the second phase particles in the power-law-breakdown (PLB) region on 9% Cr heat resistant steels is well reflected by introducing a parameter, sigma(0), into the equation. Furthermore, the construction of constitutive equations of (epsilon)over dot(m) from the PLB region to the power-law (PL) region for 9% Cr heat resistant steels has been shown to be feasible. (C) 2011 Elsevier B.V. All rights reserved.
部门归属	[chen, y. x.; yan, w.; wang, w.; shan, y. y.; yang, k.] chinese acad sci, inst met res, shenyang 110016, peoples r china. [chen, y. x.] chinese acad sci, grad sch, beijing 100049, peoples r china.;yang, k (reprint author), chinese acad sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china.;kyang@imr.ac.cn
关键词	9% Cr Heat Resistant Steels Minimum Creep Rate Premature Failure Ferritic Steels Strength Behavior Stress Rupture Breakdown Fracture
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/59913
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. X. Chen,W. Yan,W. Wang,et al. Constitutive equations of the minimum creep rate for 9% Cr heat resistant steels[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2012,534:649-653.
APA	Y. X. Chen,W. Yan,W. Wang,Y. Y. Shan,&K. Yang.(2012).Constitutive equations of the minimum creep rate for 9% Cr heat resistant steels.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,534,649-653.
MLA	Y. X. Chen,et al."Constitutive equations of the minimum creep rate for 9% Cr heat resistant steels".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 534(2012):649-653.