Welding generates thermal distortion and residual stress, and it is well known that they affect the performance of welded structures by contributing to brittle fracture, fatigue, buckling deformation, and stress-corrosion cracking. Welding distortions and residual stresses can possibly be controlled and reduced by using countermeasures. Not only thermal stress behavior but also the prediction of the microstructural phase during welding heat cycles is very important. High-strength steels or martensitic stainless steels are used in many power plant components, and the effect of phase transformation on the mechanical behavior during welding of these steels becomes much larger than that of mild steels and austenitic stainless steels. Simultaneous simulations of the thermal stress and microstructure during welding are necessary for a precise evaluation. In this paper, an analytical method and several applications using actual components are introduced in order to emphasize the effect of the microstructure on the weld residual stress analysis.
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e-mail: mmochi@mapse.eng.osaka-u.ac.jp
e-mail: toyoda@mapse.eng.osaka-u.ac.jp
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November 2007
Research Papers
Strategy of Considering Microstructure Effect on Weld Residual Stress Analysis
Masahito Mochizuki,
Masahito Mochizuki
Associate Professor, Dr. Engineer
Mem. ASME Mem. JSME Mem. JWS Mem. AWS
Department of Manufacturing Science, Graduate School of Engineering,
e-mail: mmochi@mapse.eng.osaka-u.ac.jp
Osaka University
, Suita, Osaka 565-0871, Japan
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Masao Toyoda
Masao Toyoda
Fellow ASME
Department of Manufacturing Science, Graduate School of Engineering,
e-mail: toyoda@mapse.eng.osaka-u.ac.jp
Osaka University
, Suita, Osaka 565-0871, Japan
Search for other works by this author on:
Masahito Mochizuki
Associate Professor, Dr. Engineer
Mem. ASME Mem. JSME Mem. JWS Mem. AWS
Department of Manufacturing Science, Graduate School of Engineering,
Osaka University
, Suita, Osaka 565-0871, Japane-mail: mmochi@mapse.eng.osaka-u.ac.jp
Masao Toyoda
Fellow ASME
Department of Manufacturing Science, Graduate School of Engineering,
Osaka University
, Suita, Osaka 565-0871, Japane-mail: toyoda@mapse.eng.osaka-u.ac.jp
J. Pressure Vessel Technol. Nov 2007, 129(4): 619-629 (11 pages)
Published Online: October 18, 2006
Article history
Received:
January 9, 2006
Revised:
October 18, 2006
Citation
Mochizuki, M., and Toyoda, M. (October 18, 2006). "Strategy of Considering Microstructure Effect on Weld Residual Stress Analysis." ASME. J. Pressure Vessel Technol. November 2007; 129(4): 619–629. https://doi.org/10.1115/1.2767344
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