Characterization of Structural Embrittlement of Creep Crack Growth for W-Added 12%Cr Ferritic Heat-Resistant Steel Related to the Multiaxial Stress-Reference-Cited by-同舟云学术

Characterization of Structural Embrittlement of Creep Crack Growth for W-Added 12%Cr Ferritic Heat-Resistant Steel Related to the Multiaxial Stress

Published:2008-12-17 Issue:1 Volume:131 Page:
ISSN:0094-4289
Container-title:Journal of Engineering Materials and Technology
language:en
Short-container-title:

Author:

Sugiura Ryuji¹,Yokobori A. Toshimitsu¹,Tabuchi Masaaki²,Fuji Akio³,Adachi Takeshi⁴

Affiliation:

1. Graduate School of Engineering, Tohoku University, 6-6-01 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan

2. National Institute for Materials Science, 1-2-1 Sengen, Tsukuba 305-0047, Japan

3. Department of Metallurgy, Research Institute, Ishikawajima-Harima Heavy Industries Co., Ltd., 3-1-15 Toyosu, Koto, Tokyo 135-0061, Japan

4. Faculty of Science and Engineering, Ishinomaki Senshu University, Shinmito, Minanisakai, Ishinomaki 986-8580, Japan

Abstract

In components under static creep loading condition, the multiaxial stress fields appear due to the plastic constraint and they produce a more brittle type cracking behavior. From a practical standpoint, the characterizations of creep crack growth rates under the multiaxial stress field are important to improve the methods for creep life extension. In this paper, creep crack growth tests were conducted using round bar specimens with sharp circular notches for tungsten-added 12%Cr ferritic heat-resistant steel (W12%Cr steel), and the effect of multiaxiality on creep ductility and creep crack growth rate were investigated. Furthermore, three-dimensional elastic-plastic creep finite element analyses were conducted to clarify the effect of multiaxiality on creep crack growth.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Link

http://asmedigitalcollection.asme.org/materialstechnology/article-pdf/doi/10.1115/1.3026544/5800593/011004_1.pdf

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