Comparison of creep crack growth rate in heat affected zone of welded joint for 9%Cr ferritic heat resistant steel based on C*, dδ/dt, K and Q* parameters

R. Sugiura; A. T. Yokobori; M. Tabuchi; T. Yokobori

doi:10.1016/j.engfracmech.2006.10.003

Comparison of creep crack growth rate in heat affected zone of welded joint for 9%Cr ferritic heat resistant steel based on C^, dδ/dt, K and Q^ parameters

R. Sugiura, A. T. Yokobori, M. Tabuchi, T. Yokobori

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

Abstract

Creep crack growth behavior is very sensitive to the materials' micro-structures such as the heat affected zone of a weld joint. This is a main issue to be clarified for 9%Cr ferritic heat resistant steel for their application in structural components. In this paper, high temperature creep crack growth tests were conducted on CT specimens with cracks in the heat affected zone of weld joints of W added 9%Cr ferritic heat resistant steel, ASME grade P92. The creep crack growth behavior in the heat affected zone of welded joint was investigated using the Q^* concept following which the algorithm of predicting the life of creep crack growth has been proposed. Furthermore, three-dimensional elastic-plastic creep FEM analyses were conducted and the effect of stress multiaxiality of welded joint on creep crack growth rate was discussed as compared with that of base metal.

Original language	English
Pages (from-to)	868-881
Number of pages	14
Journal	Engineering Fracture Mechanics
Volume	74
Issue number	6
DOIs	https://doi.org/10.1016/j.engfracmech.2006.10.003
Publication status	Published - 2007 Apr
Externally published	Yes

Keywords

C parameter
Creep crack growth
FEM
Load line displacement rate
P92 steel
Q concept
Welded joint

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1016/j.engfracmech.2006.10.003

Cite this

@article{7e50fbbfc63e4d95ac4db21c6f1db116,

title = "Comparison of creep crack growth rate in heat affected zone of welded joint for 9%Cr ferritic heat resistant steel based on C*, dδ/dt, K and Q* parameters",

abstract = "Creep crack growth behavior is very sensitive to the materials' micro-structures such as the heat affected zone of a weld joint. This is a main issue to be clarified for 9%Cr ferritic heat resistant steel for their application in structural components. In this paper, high temperature creep crack growth tests were conducted on CT specimens with cracks in the heat affected zone of weld joints of W added 9%Cr ferritic heat resistant steel, ASME grade P92. The creep crack growth behavior in the heat affected zone of welded joint was investigated using the Q* concept following which the algorithm of predicting the life of creep crack growth has been proposed. Furthermore, three-dimensional elastic-plastic creep FEM analyses were conducted and the effect of stress multiaxiality of welded joint on creep crack growth rate was discussed as compared with that of base metal.",

keywords = "C parameter, Creep crack growth, FEM, Load line displacement rate, P92 steel, Q concept, Welded joint",

author = "R. Sugiura and Yokobori, {A. T.} and M. Tabuchi and T. Yokobori",

note = "Funding Information: The authors acknowledge the Japan Society for Promotion of Science for its grant-in-aid, Committee 129 Project, including the support of VAMAS activities, and also to NIMS (National Institute for Materials Science). The authors gratefully acknowledge the support of the 21st COE Program, “The Exploration of the Frontiers of Mechanical Science Based on Nanotechnology” and COE (Center of excellence) Research (No. 11 CE2003) from the Ministry of Education, Culture, Sports, Science and Technology. Part of the experimental results in this research were obtained using supercomputer resources at Information Synergy Center, Tohoku University. The authors thank Dr. V.A. Yardley in Tohoku University for fruitful discussion. ",

year = "2007",

month = apr,

doi = "10.1016/j.engfracmech.2006.10.003",

language = "English",

volume = "74",

pages = "868--881",

journal = "Engineering Fracture Mechanics",

issn = "0013-7944",

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AU - Tabuchi, M.

AU - Yokobori, T.

N1 - Funding Information: The authors acknowledge the Japan Society for Promotion of Science for its grant-in-aid, Committee 129 Project, including the support of VAMAS activities, and also to NIMS (National Institute for Materials Science). The authors gratefully acknowledge the support of the 21st COE Program, “The Exploration of the Frontiers of Mechanical Science Based on Nanotechnology” and COE (Center of excellence) Research (No. 11 CE2003) from the Ministry of Education, Culture, Sports, Science and Technology. Part of the experimental results in this research were obtained using supercomputer resources at Information Synergy Center, Tohoku University. The authors thank Dr. V.A. Yardley in Tohoku University for fruitful discussion.

PY - 2007/4

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N2 - Creep crack growth behavior is very sensitive to the materials' micro-structures such as the heat affected zone of a weld joint. This is a main issue to be clarified for 9%Cr ferritic heat resistant steel for their application in structural components. In this paper, high temperature creep crack growth tests were conducted on CT specimens with cracks in the heat affected zone of weld joints of W added 9%Cr ferritic heat resistant steel, ASME grade P92. The creep crack growth behavior in the heat affected zone of welded joint was investigated using the Q* concept following which the algorithm of predicting the life of creep crack growth has been proposed. Furthermore, three-dimensional elastic-plastic creep FEM analyses were conducted and the effect of stress multiaxiality of welded joint on creep crack growth rate was discussed as compared with that of base metal.

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KW - C parameter

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KW - Load line displacement rate

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KW - Welded joint

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