Affiliation: | a Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan b Kanagawa High-Technology Foundation, KSP Bldg., East 101, 3-2-1 Sakado, Takatsu, Kawasaki, Kanagawa 213-0012, Japan c Kanagawa Industrial Technology Research Institute, 705-1 Shimoimaizumi, Ebina, Kanagawa 250-0055, Japan d Kinki University, 3-4-1 Kowakae, Higashi Osaka, Osaka 577-8502, Japan |