19 آذر 1401
مهدي كاظمي

مهدی کاظمی

مرتبه علمی: استادیار
نشانی:
تحصیلات: دکترای تخصصی / مکانیک
تلفن:
دانشکده: دانشکده فنی مهندسی

مشخصات پژوهش

عنوان
Effect of cone angle of cylindrical pin in the SFSW and DFSW on mechanical properties of AA6061-T6 alloy
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
Friction stir welding Tool geometry Mechanical properties Microhardness Aluminum alloy
سال
2021
مجله International Journal Of Mechanical And Materials Engineering
پژوهشگران مهدی کاظمی

چکیده

In the present study, the effect of cone angle of tool pin on the mechanical properties and microhardness properties of aluminum alloy AA6061-T6 specimens is investigated for three processes of SFSW, symmetric DFSW, and asymmetric DFSW. In each of the mentioned welding processes, tools with 5 different conical angles of 0, 5, 10, 15, and 20° are used. In these three welding processes, the mechanical properties of the final welded joint with conical tools have been enhanced noticeably compared to the tool with simple cylindrical pins (0° angle). Based on the obtained results, it was found that the joints obtained from asymmetric DFSW, symmetric DFSW, and SFSW had the best mechanical properties, respectively. The optimum cone angles for tool pin in SFSW, symmetric DFSW, and asymmetric DFSW processes were equal to 15, 10, and 10°, respectively. In addition, it was concluded that the welded specimen through the asymmetric DFSW with the cone angle of 10° attained the closest mechanical properties to the base (parent) metal. The parameters of YS, UTS, and E% in this sample were 78.3%, 84.8%, and 86.4% of the base sample, respectively.