Affiliations: Incubation Laboratory, Osaka Institute of Technology, Omiya, Osaka, Japan | Faculty of Engineering, Osaka Sangyo University, Nakagaito, Daito, Japan | Faculty of Science and Engineering, Setsunan University, Ikedanakamachi, Neyagawa, Japan | Setsunan University, Ikedanakamachi, Neyagawa, Japan | Junior College, Osaka Sangyo University, Nakagaito, Daito, Japan
Note: [] Address for correspondence: Hiizu Ochi, Incubation Laboratory, Osaka Institute of Technology, 5-16-1, Omiya, Asahi-ku, Osaka 535-8585, Japan. E-mail: ochi@chem.oit.ac.jp.
Abstract: Friction welding of SUS304 stainless steel to C1100 tough pitch copper was carried out and tensile strength of joints was examined. Also, a statistical analysis of the tensile strength data was investigated for judging a suitability of friction welding conditions on this joint. It was found that the SUS304 and the C1100 near the weld interface hardened and softened, respectively. There were fine-grained structures composed of much copper and a little of iron, chromium and nickel near the axial center at the weld interface. Tensile strength tended to increase with a friction time and with an upset pressure, and the maximum joint efficiency for the C1100 base metal was 101%. The shape parameter in Weibull distribution increased with an increase in mean value of tensile strength and with a decrease in dispersion of tensile strength. It seemed that the shape parameter is useful for judging the suitability of friction welding conditions.
Keywords: Friction welding, stainless steel, copper, tensile strength, Weibull distribution
