Influence of rotational speed on mechanical properties of friction stir lap welded 6061-T6 Al alloy
(1. Materials Synthesis and Characterization Laboratory, Institute of Advanced Technology,
Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;
2. Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;
3. Department of Mechanical and Manufacturing, Faculty of Engineering, Universiti Putra Malaysia,
43400 UPM Serdang, Selangor, Malaysia;
4. School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia,
43400 UPM Serdang, Selangor, Malaysia)
Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;
2. Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;
3. Department of Mechanical and Manufacturing, Faculty of Engineering, Universiti Putra Malaysia,
43400 UPM Serdang, Selangor, Malaysia;
4. School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia,
43400 UPM Serdang, Selangor, Malaysia)
Abstract: The effect of rotational speed on macro and microstructures, hardness, lap shear performance and failure mode of friction stir lap welding on AA6061-T6 Al alloy with 5 mm in thickness was studied by field-emission scanning electron microscopy (FE-SEM). The results represent much closer hardness distribution in the upper and lower plates at the lowest rotational speed. It indicates the Fe-compounds in the fracture surface of the nugget zone by EDX.
Key words: aluminum alloy; friction stir lap welding; mechanical properties