異種材溶接継手の残留応力解析


英字タイトル:
Residual Stresses in Dissimilar Metal Joint by Multi-pass Welds
著者:
鈴木 賢治 Kenji SUZUKI 山岸 葵 Aoi YAMAGISHI 西川 聡 Satoru NISHIKAWA 菖蒲 敬久 Takahisa SHOBU
発刊日:
公開日:
カテゴリ: 論文
キーワードタグ:

概要

In this study, a residual stress distribution in a dissimilar plate butt-welded joint was simulated by a thermo-elastic finite element method. The base metal was the austenitic stainless steel SUS316L. The other base metal was nickel super-alloy NCF600, and the weld metal was the alloy 82 (YNiCr-3). The dimensions of the plate butt-welded joint were a width of 200 mm, a length of 250 mm and a thickness of 25 mm. The welding joint was fabricated by TIG welding with 22 passes. For comparison, the residual stress distribution for the similar butt-welded joint of SUS316L was simulated as well as the dissimilar welded joint. According to the simulated results, there was not the difference in the thermal field between the similar and the dissimilar welded joints. The residual stress distribution in the similar welded joint became symmetrical to the welding center after removal of the weld bead. For the dissimilar welded joint, the peak of the residual stresses moved to the NCF600 side a little. The residual stress level of the dissimilar welded joint was large compared with the similar welded joint. The residual stress of the welding direction was larger than that of the transverse direction.


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