摩攪拌成形(FSF)による異種材料の易分解接合

抄録

Dissimilar materials joining is a key technology for the fabrication of lightweight parts; however it can be a barrier against recycling. In this paper, the authors propose the concept of easily-decomposable joining of dissimilar materials with employing friction stir forming (FSF) and report its demonstration. A steel sheet having a key hole was prepared and put it on the mold having the cavity of a hook. An aluminum alloy plate was put on them and conducted friction stirring on its back surface. Due to massive heat and compression force generated by the friction stirring, a hook-like joint was successfully generated and the authors confirmed that the steel sheet and aluminum alloy plate were able to be disassembled after processing. Opposite hooks generated by the above approach join dissimilar materials tightly, but the materials are able to be decomposed smoothly after cutting them between the hooks.