抄録
It is investigated that the weld of flame-resistance magnesium alloy by FSW, and discussed about influence of the joint speed, evaluation of tensile stress and mechanism of the changing of grain size. With the welding of flame resistance magnesium alloy by FSW, joint speed of 5-15mm/s was possible. In addition, tensile strength of the joint specimen is more than 80% for parent materials by reduction of grain size in SZ part. It is thought that reduction of grain size was influenced by twin deformation during FSW.
