Lap joining of aluminum 5052 to copper by optimum friction stir spot welding process

In the present study, lap joints of dissimilar 5052 aluminum alloy and pure copper were fabricated by friction stir spot welding process. The work was aimed to find simultaneous effect parameters such as tool rotary speed (1000, 1500, 2000 rpm) dwell time (5, 10, 15 s) on shear force (LSF), hardness, microstructure evolution. Also, statistical models quality characteristics developed understand which parameter has dominant characteristics. Research findings showed that obtain sound with high strength, 1500 rpm s should be selected. It provides sufficient heat input for mechanical interlocking prevents formation coarse thick intermetallic compounds (IMCs) in zone. On other hand, achieve maximum chosen provide enough compound 10 used prevent refining. Moreover, from analyses, it found are significant factors strength respectively. order attain 1630 14 used. condition, 1980 N hardness 78 V achieved desirability 86%.