To reduce tensile residual stress in a welded region, we developed a new cooling method that applies a water shower behind the welding torch. When this method is applied to the welding of austenitic stainless-steel, the welding and cooling conditions mainly determine how much the residual stress can be reduced. To optimize these conditions, we first used FEM to determine the effects of preheating temperature, heat input quantity, and water-shower area on the residual stress, and found that, to decrease tensile residual stress, preheating temperature should be high, heat input low, and the water-shower large. To confirm the effectiveness of these optimized conditions, residual stresses under optimized or non-optimized conditions were experimentally measured. It was found that the residual stresses were tensile under the non-optimized conditions, but compressive under the optimized ones. These measurements agree well with the FEM analysis. It can therefore be concluded that the optimized conditions are valid and appropriate for reducing residual stress in an austenitic stainless-steel weld.
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ASME 2003 Pressure Vessels and Piping Conference
July 20–24, 2003
Cleveland, Ohio, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
0-7918-4155-3
PROCEEDINGS PAPER
Optimized Conditions for Tensile Residual Stress Reducing Weld Using Water-Shower Cooling
Nobuyoshi Yanagida,
Nobuyoshi Yanagida
Hitachi, Ltd., Hitachi, Ibaraki, Japan
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Kunio Enomoto,
Kunio Enomoto
Hitachi, Ltd., Hitachi, Ibaraki, Japan
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Hideya Anzai
Hideya Anzai
Hitachi, Ltd., Hitachi, Ibaraki, Japan
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Nobuyoshi Yanagida
Hitachi, Ltd., Hitachi, Ibaraki, Japan
Kunio Enomoto
Hitachi, Ltd., Hitachi, Ibaraki, Japan
Hideya Anzai
Hitachi, Ltd., Hitachi, Ibaraki, Japan
Paper No:
PVP2003-2043, pp. 23-28; 6 pages
Published Online:
August 13, 2008
Citation
Yanagida, N, Enomoto, K, & Anzai, H. "Optimized Conditions for Tensile Residual Stress Reducing Weld Using Water-Shower Cooling." Proceedings of the ASME 2003 Pressure Vessels and Piping Conference. Residual Stress, Fitness-For-Service, and Manufacturing Processes. Cleveland, Ohio, USA. July 20–24, 2003. pp. 23-28. ASME. https://doi.org/10.1115/PVP2003-2043
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