溶接残留応力・溶接変形におよぼす相変態の影響(<特集>溶接金属の水素量)

概要

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In previous papers, we have shown that welding residual stresses distributions and welding deformations were determined by thermo-elasto-plastic parameters. But the effect of transformation expansion on residual stresses and welding deformations is not clear. In the present paper, we deal with the effect of transformation expansion on residual stress distributions and welding defomrations. Main conclutions obtained are as follows : (1) Transformation expansion has effects upon residual stresses distributions, but does not have effects upon welding deformations. (2) Differences of welding deformations between mild steel and high strength steels depend on their yield strength. (3) Preheat temperature influence considerably residual stresses distributions of high strength steels, when yield strength σ_Y is greater than or equal to 0.252 (θ_r-θ_i-T_<av>). (4) Conventional formulae are presented for calculating residual stresses distributions and welding deformations of high strength steels.
社団法人溶接学会の論文
1976-07-05