溶接構造用 Al-Zn-Mg 系合金の研究(第 1 報) : 溶接部の時効特性について

概要

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A study has been made of aging characteristics of Al-Zn-Mg alloy welds. The parent metal contained Al-4.1% Zn-1.6% Mg-0.3% Mn and the filler metals were 5056,5356 alloys and parent metal fillers. All of the weldments could make almost the maximum recovery of strength in 90 days of nutural aging after welding. The weld strength, however, difinitely depended on welding processes, filler metals and previous heat treatments of parent metal. All of the undressed TIG and MIG-welds of 2mm thick plate fractured at the heat-affected-zone when they were tensile-tested after natural aging of 90 days. The undressed TIG-welds of 5mm thick plate fractured at the heat-affected-zone when they were tensiletested after natural aging of 90 days, but the dressed TIG-welds and all of the MIG-welds fractured at the weld metal. The strength of welds depends on the structure of heat-affected-zone and the aging characteristics of weld metal. The former is affected by the reversion of G-P zone and the growth of M' particles during welding, and the latter by the chemical composition of weld metal.
社団法人溶接学会の論文
1966-09-25