Abstract
AbstractFriction stir welding was developed to primarily join the aluminium alloys, but it causes thermal stresses because of thermal cycle and constraints (mechanical) during the process. Thus, reduces the life of components. Aluminium alloy AA 6061-T6 is highly demanded in transportation industries and many times requires the joining of two pieces. In the present research, the temperature and thermal stress distribution during the friction stir welding of AA 6061-T6 alloy are evaluated by using finite element method. Effect of tool shoulder diameter and cone angle have been compared with respect to maximum temperature and thermal stresses generated during the welding process. The finding shows that a tool with a 24 mm diameter and 7° cone angle has maximum temperature of 730.69 K which is greater than 6% as compared to flat shoulder with same diameter. Maximum value of thermal tensile stress is obtained for tool with flat shoulder and 24 mm diameter. KeywordsFriction stir weldingTemperature distributionAluminium alloyThermal stressesTool geometry
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