溶接熱影響部の結晶粒粗大化に関する研究(第 3 報)

概要

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Previously, the authors proposed the method to calculate the grain growth during thermal cycle. That is, the thermal cycle is divided into small steps and the equation for isothermal-grain growth is applied to each step. By summing up grain growth on these steps, grain size during thermal cycle can be calculated. Then, it was confirmed that this method could be applied to various thermal cycles in commercial-purity nickel. In this report, as the next step, this method was applied to actual weld thermal cycles. Weld thermal cycles were measured in weld-heat affected zone of TIG arc welded (without filler metal) commercial-purity nickel of 2mm thickness. Then, grain size in weld-heat affected zone was calculated. by applying above mentioned method to measured thermal cycles, and compared with measured grain size. Next, the course of grain growth and grain growth rate during weld thermal cycles were made clear using this method. Finally, effect of initial grain size on grain growth in weld-heat affected zone was investigated by this method.
社団法人溶接学会の論文
1975-02-05