Modelling of residual stresses in a narrow-gap welding of ultra-thick curved steel mockup

2018 ◽  
Vol 256 ◽  
pp. 239-246 ◽  
Author(s):  
Chuan Liu ◽  
Jiawei Yang ◽  
Yifeng Shi ◽  
Qiang Fu ◽  
Yong Zhao
Keyword(s):  
Residual Stresses ◽  
Narrow Gap ◽  
Narrow Gap Welding ◽  
Curved Steel

Investigation on narrow-gap welding residual stresses in ultra-thick ring-type mockups

2018 ◽  
Vol 5 (1) ◽  
pp. 016526 ◽  
Author(s):  
Chuan Liu ◽  
Jiawei Yang ◽  
Yifeng Shi ◽  
Yong Zhao
Keyword(s):  
Residual Stresses ◽  
Narrow Gap ◽  
Narrow Gap Welding ◽  
Ring Type

Effect of Groove Designs on Residual Stress and Transverse Shrinkage in GMAW and PGMAW of A333 Seamless Steel Pipes

2020 ◽  
Vol 19 (04) ◽  
pp. 799-813
Author(s):  
Rohit Mishra ◽  
Avani Kumar Upadhyay ◽  
Amneesh Singla ◽  
Yashvir Singh
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Optimum Number ◽  
Narrow Gap ◽  
Narrow Gap Welding ◽  
Weld Deposit ◽  
Steel Pipes ◽  
Grade 3 ◽  
Number Of Passes ◽  
Transverse Shrinkage

The effectiveness of weld joints primarily depends on the fusion of base metal, minimum heat-affected zone (HAZ) and lesser residual stresses. The severity of thermomechanical effects e.g. weld shrinkages and residual stresses is significantly minimized by narrow gap welding technique over the traditional welding. This work describes the welding of A333 Grade 3 steel pipes by the application of GMAW and PGMAW techniques. The analysis is made to capture the effects of groove designs on residual stress and transverse shrinkage. The process parameters used for the analysis are voltage, current and welding speed. In this work, narrow groove design using PGMAW process is capable of reducing the number of passes and area of weld deposit by 35–40% by volume. In PGMAW, decrement in residual stresses is observed with a narrow groove compared to conventional V groove technique. The results are validated by metallurgical and mechanical investigation of welded joints. This work will help other researchers to understand the effect of narrow gap welding using an optimum number of passes for thick pipes.

Modeling of weld formation in variable groove narrow gap welding by rotating GMAW

2020 ◽  
Vol 57 ◽  
pp. 163-173
Author(s):  
Wenhang Li ◽  
Chengfu He ◽  
Jinshan Chang ◽  
Jiayou Wang ◽  
Jing Wu
Keyword(s):  
Narrow Gap ◽  
Narrow Gap Welding ◽  
Weld Formation

Analysis of welding distortion due to narrow-gap welding of upper port plug

2010 ◽  
Vol 85 (5) ◽  
pp. 780-788 ◽  
Author(s):  
Pankaj Biswas ◽  
N.R. Mandal ◽  
Parameswaran Vasu ◽  
Shrishail B. Padasalag
Keyword(s):  
Welding Distortion ◽  
Narrow Gap ◽  
Narrow Gap Welding

Fundamental study of narrow-gap welding with oscillation laser beam

2016 ◽  
Vol 30 (9) ◽  
pp. 699-707 ◽  
Author(s):  
Yosuke Yamazaki ◽  
Yohei Abe ◽  
Yukio Hioki ◽  
Mitsuyoshi Nakatani ◽  
Akikazu Kitagawa ◽  
...  
Keyword(s):  
Laser Beam ◽  
Narrow Gap ◽  
Narrow Gap Welding ◽  
Fundamental Study
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