Abstract
In present study, various aluminum alloys pipe to steels pipe were friction welded, and the mean value and scatter of welded joints were investigated. That is, thirty specimens for each combination of three aluminum alloys pipe to five steels pipe were friction welded under the optimum friction welding condition and the joint efficiency of welded joints were evaluated by tensile test. After performing statistical analysis and Weibull analysis on the joint efficiency, the following results were obtained, (1) The joint efficiency of A6061/steel showed a normal type distribution, but the A5052/steel and A6063/steel showed a distortional type and a double peak type distribution, respectively. (2) A difference was found in the joint efficiency of A5052/carbon steel and A5052/stainless steel showing high joint efficiency in the A5052/S45C and A5052/SUS304. (3) In the A606l/carbon steel and A6061/stainless steel, no difference was found in joint efficiency. (4) In the case of A6063/carbon steel, any difference of the joint efficiency was not found, while a difference was found in the case of A6063/stainless steel. (5) A reference table on the joint efficiency and joint strength for three aluminum alloys pipe to five steels pipe was presented.
