309 衝撃圧接による化合物層のインデンテーション法による機械的特性の評価(OS 材料・構造の動的特性(2))

概要

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The impact welding of aluminum onto copper was carried out using a gas gun and the mechanical properties of Al/Cu joint were investigated by the tension test and a micro hardness indentation test. The results of the tension test suggested that it was necessary to make a microscopic survey of the joining interface. Then, the inverse analysis with FEM analysis was applied to the load and depth curves measured by the indentation technique to identify the mechanical constants in the constitutive equations of aluminum, copper and the compound layer. The nominal stress - strain curve of the compound layer obtained by the numerical simulation showed the typical feature of brittle material. The ultimate tensile stress of the compound layer was about 1.2 GPa and ten times larger than that of aluminum. It was clarified from those results that the bonding strength of Al/Cu joint was dependent on the integrity of the compound layer.
社団法人日本機械学会の論文
2004-11-05