Study on heat generation and distribution during friction stir welding of AA1100 aluminum alloy

Authors

1 Department of Mechanical Engineering , Sari Branch, Islamic Azad University, Sari, Iran.

2 Assistant Professor, Faculty of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Mazandaran, Iran

Abstract

In this article effects of friction stir welding (FSW) tool rotational and traverse speeds were studied on heat generation and temperature distribution in welding zone of AA1100 aluminium alloy. Computational fluid dynamics method was used to simulate the process with commercial CFD Fluent 6.4 package. To enhance the accuracy of simulation in this Study, the welding line that is located workpieces interface, defined with pseudo melt behaviour around the FSW pin tool. Simulation results showed that with increase of FSW tool rotational speed, the generated heat became more and dimensions of the stir zone will be bigger. The calculation result also shows that the maximum temperature was occurred on the advancing side. The computed results showed that with increasing tool linear speeds the heat generation experienced growth down trend. With increasing traveling speeds the time to reach maximum temperature in stir zone growth but the tool rotational speed dose not effect on time to reach maximum temperature. The model outcomes shows that more than 85% total heat was produced by tool shoulder and the maximum heat with selected parameters in this study was 801 kelvin degrees.