Joining relatively different melting point materials with metal powder and electromagnetic energy
- Univ. of Ryukyus, Okinawa (Japan)
- Osaka Univ. (Japan). Welding Research Inst.
- Industrial Research Lab. of the Okinawa Prefecture (Japan)
In this study, experiments on solid-state joining were performed under atmospheric conditions by using metal powder medium which was sandwiched in the space between the two solid materials of specimen to be joined (i.e., base metal). In the first experiment, solid specimen were same materials and had a same melting point as the same powder medium. In the second and third, solid specimen were different materials and had relatively different melting points, and with considerably higher melting point materials with nickel powder medium. Complete joining samples were compressed longitudinally by electrodes and current was conducted simultaneously to generate Joule thermal heat. Some fundamental data on the mechanical and metallurgical properties of the joint were obtained by resistance welding and tests. The data was discussed with a view to optimizing the method, and was compared with that of the base metals, in terms of tensile, impact strength, Vickers hardness tests; bending U shape flexure test; the macro and micro structural observation was also made by microscopes. The solid specimen bars of the materials used in this study were pure copper, stainless steel, tungsten carbide and titanium cylindrical bars of solid specimen, and the insert materials were atomized copper and nickel powder medium. Some of the mechanical and metallurgical properties were studied by examining the macro and micro structures of the joint section. In particular, the experimental data obtained was compared with those of the base metals, and was found that the strength of the joint reached approximately that of the annealed one of the lower melting point solid copper specimen bar.
- OSTI ID:
- 485096
- Report Number(s):
- CONF-970146--; ISBN 1-890277-03-7
- Country of Publication:
- United States
- Language:
- English
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