Results 231 to 240 of about 34,463 (271)
Some of the next articles are maybe not open access.
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
openaire +1 more source
IN792 DS Superalloy: Optimization of EB Welding and Post-Welding Heat Treatments
Materials Science Forum, 2016Electron beam (EB) welding has been used to realize the seams on 2 mm thick plates of directionally solidified (DS) IN792 superalloy. A grid of the samples has been prepared by varying the pass speed v from 1 to 2.5 m/min, while the other process parameters (power P = 1 kW, acceleration voltage T = 50 kV, beam current I = 20 mA) were kept constant ...
Barbieri G. +4 more
openaire +4 more sources
Weld repair of grade 91 steel without post-weld heat treatment
Materials Research Innovations, 2013A weld repair technique to be used without post-weld heat treatment has been developed for use on grade 91 steel. The approach makes use of standard (non- modified) 9CrMo weld metal. The work has extended an approach used successfully on the low alloy steel ½CrMoV, which utilised a low strength 2CrMoL weld metal, to the more advanced steel grade 91 ...
S. J. Brett, K. C. Mitchell
openaire +1 more source
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
openaire +1 more source
FCAW process to avoid the use of post weld heat treatment
International Journal of Pressure Vessels and Piping, 2006Abstract Post weld heat treatment (PWHT) is the most common technique employed for relieving residual stresses after general repair welding. Besides, the primary purpose of reducing the effect of stresses induced by welding, PWHT is also intended to temper the metallurgical structure of the heat-affected zone (HAZ).
A. Aloraier, R. Ibrahim, P. Thomson
openaire +1 more source
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
openaire +1 more source
Evaluation of AISI 4140 Steel Repair Without Post-Weld Heat Treatment
Journal of Materials Engineering and Performance, 2008The present work evaluates the two-layer technique on the heat affected zone (HAZ) of AISI 4140 steel welded with different heat input levels between the first and second layer. The weld heat input levels selected by the Higuchi test were 5/5, 5/10, and 15/5 kJ/cm.
Cleiton C. Silva +4 more
openaire +1 more source
Post-Weld Heat Treatment Stress Relaxation in Zircaloy 4 Plasma Welds
Materials Science Forum, 2006We have studied the effect of a post-weld heat treatment on plasma arc welds on Zircaloy 4 plates. The samples consist of two 100 mm long, 50 mm wide, and 6.25 mm thick plates, welded along the rolling (longitudinal) direction. The heat-treatment consisted of a steady increase in temperature from room temperature to 450oC over a period of 4.5 hours ...
J.R. Santisteban +7 more
openaire +1 more source
Post Weld Heat Treatment of Oilfield 13Cr Stainless Steels
CONFERENCE 2024Abstract Type 13Cr martensitic stainless steels are widely used for threaded and coupled oilfield casing and tubing because of their resistance to corrosion by dissolved carbon dioxide and their cost advantage over most other corrosion-resistant alloys. However, 13Cr used for welded downhole components requires careful planning.
openaire +1 more source
Fracture Analysis With Residual Stresses From Local Post-Weld Heat Treatment
Volume 1: Codes & Standards; Computer Technology & Bolted JointsAbstract This study, based on calculations performed by Framatome and ESI Group with ONET Technologies for ONET Technologies Nuclear Pressure Equipment (NPSE) justification, deals with an industrial case which consists of a numerical simulation of a Post Weld Heat Treatment (PWHT) of a butt weld of a Level 1 NPSE and its associated ...
François Billon +5 more
openaire +1 more source