Experimental Investigation of Variation in Mechanical and Microstructural Properties Along the Length of Similar AA6063 FSW.

Authors

  • Adnan A. Ugla Mechanical Engineering Department ,College of Engineering ,University of Thi-Qar

DOI:

https://doi.org/10.31663/utjes.v2i4.161

Keywords:

friction stir welding, Temperature distribution, mechanical properties, friction stir process.

Abstract

  In this paper, 6063-T4 Al-alloy sheets with dimensions(6x90x200) mm were joined viafriction stir welding (FSW). Tow sheets were but welded with square mating edges. Therotating welding tool made of tool steel heat-treated to HRC 60.The temperaturedistributionhad been investigated experimentally with constant revolution speed and constant linearspeed. A digital reader of twelve channels was used to read and record the temperature withtime at each channel as an excel table. Nine K-type thermocouples were positioned along theweld length. The mechanical properties were evaluated (such as tensile strength ,microhardness, and microstructure tests) at room temperature in several positions along thelength of the joint. The results show that the max. temperature was conducted at the end of theweld to be 375C ̊. The relationships between the peak temperature and the time, distance fromstart, microhardness, tensile strength, and microstructure were discussed. The hardness of thestirred zone was more than the base metal hardness due to refinement of grains byfriction stirprocess. The strength and hardness of the FSW were as min. at the end of the weld due toincreasing in heat input to the joint at this region which lead to grain growth at themicrostructure of last region.  

Downloads

Published

2011-12-01

Issue

Section

Articles

How to Cite

Experimental Investigation of Variation in Mechanical and Microstructural Properties Along the Length of Similar AA6063 FSW. (2011). University of Thi-Qar Journal for Engineering Sciences, 2(4), 64-80. https://doi.org/10.31663/utjes.v2i4.161