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Analysis of residual stress relief mechanisms in post-weld heat treatment
International Journal of Pressure Vessels and Piping, 2014Abstract This paper presents a recent study on weld residual stress relief mechanisms associated with furnace-based uniform post-weld heat treatment (PWHT). Both finite element and analytical methods are used to quantitatively examine how plastic deformation and creep relaxation contribute to residual stress relief process at different stages of PWHT
Pingsha Dong, Shaopin Song
exaly +2 more sources
Hyperbaric Post Weld Heat Treatment
Offshore Technology Conference, 1983ABSTRACT This paper describes a sub-sea hyperbaric Post Weld Heat Treatment (PWHT) system developed jointly by SHELL UK EXPLORATION & PRODUCTION and COMEX DIVING. It discusses:Assessment of power requirements and equipment,Initial tests conducted in the COMEX hydrosphere and in shallow water in Marseille,Full ...
Stuart Saunderson, David Waller
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Post-weld heat-treatment cracking in superalloys
International Metals Reviews, 1983AbstractThis review is concerned with a type of cracking that often occurs during the postweld heat-treatment of Ni-base superalloys.
R. Thamburaj, w. Wallace, J. A. Goldak
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Welding, Repair and Local Post Weld Heat Treatment Residual Stresses
Volume 2: Computer Technology & Bolted Joints; Design & Analysis, 2023Abstract The study presented deals with an industrial case and relates to the calculation of the residual stresses in a butt weld of two shells of large diameter, high thickness and great length constituting part of pressure equipment. After completion of the weld, it can be repaired if unacceptable defects are detected ...
François Billon +4 more
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Residual Stress Relief in Post-Weld Heat Treatment
Volume 6: Materials and Fabrication, Parts A and B, 2008This paper focuses on analysis of weld residual stress relief process during furnace-based uniform post-weld heat treatment (PWHT). Two classes of pressure vessel steels: 2-1/4CrMo and carbon steel are considered in seam weld configurations. It is found that the dominant mechanism for residual stress relief is the creep relaxation that occurs much ...
Pingsha Dong, Jeong K. Hong
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Low stress welding technology without post-weld heat treatment
Materials Science and Technology, 2009In order to assure the tightness and the service life of a full welded body ball valve, the temperature of grommet cannot exceed 150°C. Therefore, post-weld heat treatment cannot be used to relieve the welding residual stresses. In this study, a low stress welding technology was studied.
J. J. Xu, L. G. Chen, C. Z. Ni
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In-Situ Post-Weld Heat Treatment of Wet Welds
Offshore Technology Conference, 19921.0 Introduction There is a substantial interest in implementing wet welding for structural repairs of offshore installations. Some of the restrictions to its use are heat affected zone (HAZ) hardening and cracking, and the inability to produce wet welds that meet the bend test requirements of a surface weld ...
Peter Szelagowski +3 more
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Optimisation of post-weld heat treatment — A simple, practical method
Sadhana, 2003The authors have evolved an empirical method for characterizing resistance to ductile fracture using two parameters Γ f andηf that can be determined from tensile test data of smooth cylindrical specimens. This method stipulates that the post-necking regime during tensile deformation is dominated by microvoid growth ...
P. Rodriguez, S. K. Ray, A. K. Bhaduri
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