e-ISSN 2231-8542
ISSN 1511-3701

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Effect of Tool-Pin Profile on Weld Zone and Mechanical Properties in Friction Stir Welding of Aluminium Alloy

Prashant Prakash, Sanjay Kumar Jha and Shree Prakash Lal

Pertanika Journal of Tropical Agricultural Science, Volume 26, Issue 2, April 2018

Keywords: Friction stir welding, mechanical properties, microstructure, tool pin-profiles, weld-zone shape

Published on: 30 Apr 2018

This article presents the experimental analysis of tool pin-profile effects on the weld zone shape, mechanical properties and microstructure of the friction stir welding (FSW) process. To determine tool pin-profile effects on weld zone shape, mechanical properties and microstructure, four different pin-profile tools were used namely, the cylindrical pin, conical pin, cylindrical-conical pin and stepped-conical pin. The results of the experiment showed that weld-zone shape thickness of the cylindrical-conical tool near the shoulder was the highest and the conical pin-profile tool was the lowest near the bottom of the tool pin with respect to all other tool pin-profiles. Fine grain structure was produced by the stepped-conical pin-profile tool in the weld zone compared with the other three pin-profile tools. Yield strength, ultimate tensile strength, ductility and joint efficiency of the stepped-conical tool were the highest among all the tool pin-profiles. Additionally, this article also explains the effect of weld-zone shape on mechanical properties, showing that the small basin shape of the weld-zone shape produces high yield strength, ultimate tensile strength, ductility and joint efficiency.

ISSN 1511-3701

e-ISSN 2231-8542

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