Author : Ram Niwas Bishnoi, Pawan Kumar Sapra and Raman Bhambhu

In present work, an investigation has been carried out on friction stir welding (FSW) in 6mm thick plates of AA19000 aluminium alloy using high carbon high chromium alloy steel tool. Three different tool pin profiles namely straight cylindrical threaded and square have been used to fabricate the joint at constant tool rotational speed of 1400 rpm and traverse speed of 20mm/min. Shape of the tool pin profile and weld side are process variables. It has observed that hardness value of double sided welded joints is slightly greater than single sided welded joints. From this investigation it is found that threaded tool pin profile produces mechanically sound weld and superior tensile properties as compared to other joints. Single sided welded joints have shown lower tensile strength and also percentage of elongation and lower hardness value as compared to the double sided welded joints and this trend is common for all welded joints.

Keywords: Friction Stir Welding; Aluminium Alloy AA19000; Tool Pin Profile; Mechanical Properties.

Article published in International Journal of Current  Engineering  and Technology, Vol.3,No.4(Oct- 2013)