期刊
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
卷 113, 期 -, 页码 49-59出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijpvp.2013.11.002
关键词
Cold work; Contour method; Cyclic hardening; Multi pass laser welding; Narrow groove welding; Weld distortion
资金
- Egyptian government, Ministry of Defense
- UK EPSRC (Engineering and Physics Sciences Research Council) New Nuclear Manufacturing (NNUMAN) programme [EP/J021172/1]
- EPSRC [EP/J021172/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/J021172/1] Funding Source: researchfish
Thick-section austenitic stainless steels have widespread industrial applications, especially in nuclear power plants. The joining methods used in the nuclear industry are primarily based on arc welding processes. However, it has recently been shown that narrow gap laser welding (NGLW) can weld materials with thicknesses that are well beyond the capabilities of single pass autogenous laser welding. The heat input for NGLW is much lower than for arc welding, as are the expected levels of residual stress and distortion. This paper reports on a preliminary investigation of the through-thickness 2D residual stresses distributions, distortions, and plastic strain characteristics, for the NGLW process using material thicknesses up to 20 mm. The results are compared with those obtained with gas-tungsten arc (GTA) welding. While further work is required on thicker test pieces, preliminary results suggest that the longitudinal tensile residual stresses in NGLW joints are 30-40% lower than those for GTA welds. (C) 2013 Elsevier Ltd. All rights reserved.
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