Dissimilar spot welding of aluminium alloy and hot dip galvanised steel by metal flow: application of friction anchor welding to aluminium alloy and Zn-coated steel |
| |
| Authors: | Masaru Skamura Kaoru Ohishi Kohei Ota Yoshihiro Takeyasu Shigeyuki Mizunari Hidetoshi Fujii |
| |
| Affiliation: | 1. Hiroshima Prefectural Technology Research Institute, Hiroshima, Japan;2. Joining and Welding Research Institute, Osaka University, Suita, Japan;3. Joining and Welding Research Institute, Osaka University, Suita, Japan |
| |
| Abstract: | ![]()
Lap joints of an upper Al alloy (1.0 mm-thick A5052) and lower hot dip galvanized steel (1.2 mm-thick GI steel) were welded by a novel spot welding process for dissimilar metal lap joints using a new tool with the tip made of spherical ceramics, i.e. ‘Friction Anchor Welding’. As a result, the rotating tool was plunged only to 1.3–1.4 mm from the Al alloy surface, and accordingly, a steel projection was not formed in the Al alloy sheet. Further, the Al alloy near the rotating tool was removed. However, near this removed area, the Zn layer on the GI steel melted and was removed by friction heat, and consequently, the GI steel and the Al alloy were welded. Thus, the tensile shear strength reached about 2.6 kN/point. |
| |
| Keywords: | Dissimilar meals friction stirring projection Zn-coated steel aluminium alloy |
|
|
