Positional dependence of material flow in friction stir welding: analysis of joint line remnant and its relevance to dissimilar metal welding

Kumar, K and Kailas, SV (2010) Positional dependence of material flow in friction stir welding: analysis of joint line remnant and its relevance to dissimilar metal welding. In: Science and Technology of Welding & Joining, 15 (4). pp. 305-311.

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Abstract

Understanding material flow in friction stir welding is important for production of sound dissimilar metal welding that control the intermixing of two alloys being welded and consequent formation of new constituents which influences the weld properties. In the present experimental investigation material flow patterns are visualised using dissimilar and similar aluminium alloys using a simple innovative ,experiment. The experimental results reveal that only a portion of material transported from the leading edge undergoes chaotic flow and the remaining is deposited systematically in the trailing edge of the weld. Using this information it is shown that the formation of a friction stir welding defect, joint line remnant, does not occur only when the weld interface is on the advancing side. The material flow visualisation study has been utilised to analyse the mechanism of weld formation and its usefulness in improving fatigue properties and for dissimilar metal welds.

Item Type:	Journal Article
Publication:	Science and Technology of Welding & Joining
Publisher:	Maney Publishing
Additional Information:	Copyright for this article belongs to Maney Publishing
Keywords:	Dissimilar welding;Material flow properties;Defects;Tensile and fatigue properties
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	22 Jul 2010 05:02
Last Modified:	16 Aug 2012 12:05
URI:	http://eprints.iisc.ac.in/id/eprint/30377

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