3228 A5052/SUS304異種金属拡散接合体の強度特性(J07-1 締結・接合の力学とプロセス(1),J07 締結・接合の力学とプロセス)

概要

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Intermetallic phase (IMP) formed at the interface is dominant on strength of a dissimilar metals joint. In this study, A5052/SUS304 dissimilar metals diffusion bonding was conducted. Formation behavior of IMP was studied from cross sectional observation of a joint obtained. Strength of a joint reduced significantly when thickness of IMP layer above 12μm. Case of thin IMP layer, fracture path was interface between IMP/A5052 or IMP/SUS304. However, fracture path was inside of IMP layer for case of thick IMP. FEM analysis was carried out to obtain stress distribution around the interface. Stress concentration was observed near the interface between A5052/IMP. Stress distribution inside of IMP changed with change of thickness of IMP. This may leads difference of fracture path and the result shows different strength of a joint.
2006-09-15