Results 201 to 210 of about 1,666 (239)
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Improvement of Post Weld Heat Treatment Rules on Welded Joints
1989In order to improve the post weld heat treatment rules on welded joints, a cooperative programme of research, sustained by the Minsistry of Research and Technology has been set up on 1985. The study concerning the behaviour to fracture of as welded and post weld heat treated joints in SE 701 steel with great sizes permitted to lay down the influence of
J. Gilgert +5 more
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Post Weld Heat Treatment of Friction Stir Welded AA2017
2012In this study a friction stir welded AA2017 is post weld heat treated at 500 °C for holding time of 20, 40 and 60min then quenched in water and naturally aged. The effect of post weld heat treatment on the microstructure and hardness is investigated across the transverse cross section of the weld.
M. M. Z. Ahmed, B. P. Wynne
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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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Effect of Post Weld Heat Treatment on Weld Hardness Quality of P91 Welded Pipes
Applied Mechanics and Materials, 2015Quality of a weld produced is generally evaluated by different parameters such as weld size, bead geometry, deposition rate, hardness and strength. A common problem that has been faced at the construction sites is to obtain a good welded joint having the required strength with minimal detrimental residual stresses to avoid any premature cracking due to
Mohd Amin Abd Majid, Muhammad Sarwar
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Effect of post weld heat treatment on weldability of high entropy alloy welds
Science and Technology of Welding and Joining, 2018The effect of post weld heat treatment (PWHT) temperature on laser beam welds in high-entropy alloys (HEAs) using a cold-rolled cantor system (CoCrFeMnNi) was investigated. Laser welding of low heat input was applied to reduce thermal distortion. The cold-rolled HEA welds indicated larger grain size and inferior tensile/hardness properties as compared ...
Hyunbin Nam +2 more
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The effect of post weld heat treatment on welds in steel structures
1983The effect of post weld heat treatment (PWHT) on residual stresses, yield strength and toughness as well as on microstructural features of submerged are weld metal was studied with three types of C-Mn-steels. All techniques used for measuring residual stress reduction in PWHT were found insufficient to adequately characterise the stress distribution ...
Gren, Pekka +3 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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Effect of Pre- and Post-weld Heat Treatments on Linear Friction Welded Ti-5553
Metallurgical and Materials Transactions A, 2014Linear friction welding allows solid-state joining of near-beta (β) titanium alloy Ti-5553 (Ti-5Al-5V-5Mo-3Cr). In the as-welded condition, the weld zone (WZ) exhibits β grain refinement and marked softening as compared with Ti-5553 in the solution heat treated and aged condition.
Wanjara, Priti +5 more
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Numerical studies of post weld heat treatment on residual stresses in welded impeller
International Journal of Pressure Vessels and Piping, 2017Abstract The temperature filed was simulated by use of the established moving heat source model of TIG welded impeller. The obtained computational temperature can be treated as thermal load for the computation of the residual stress near weld. The comparison with experimental data in published literature can validate the proposed models.
Z. Zhang, P. Ge, G.Z. Zhao
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Stress Effect on Post-Weld Heat Treatment Embrittlement
1990Post-weld heat treatment (PWHT) is carried out to improve fracture toughness and to remove residual stress in the heat-affected zone (HAZ). There are some problems, such as a toughness decrease and stress-relief cracking (SRC) in the coarse-grained HAZ subject to the effect of the tempering treatment. Therefore, in this paper, the effect of the heating
J-K Lim, S-H Chung
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