The role of friction stir welding tool on material flow and weld formation

Kumar, K and Kailas, Satish V (2008) The role of friction stir welding tool on material flow and weld formation. In: Materials Science and Engineering: A, 485 (1-2). pp. 367-374.

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Abstract

In this investigation an attempt has been made to understand the mechanism of friction stir weld formation and the role of friction stir welding tool in it. This has been done by understanding the material flow pattern in the weld produced in a special experiment, where the interaction of the friction stir welding tool with the base material is continuously increased. The results show that there are two different modes of material flow regimes involved in the friction stir weld formation; namely “pin-driven flow” and “shoulder-driven flow”. These material flow regimes merge together to form a defect-free weld. The etching contrast in these regimes gives rise to onion ring pattern in friction stir welds. In addition to that based on the material flow characteristics a mechanism of weld formation is proposed.

Item Type:	Journal Article
Publication:	Materials Science and Engineering: A
Publisher:	Elsevier
Additional Information:	Copyright of this article belongs to Elsevier
Keywords:	Friction stir welding;Material flow;Mechanism;Defects;Tool design
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	19 Jun 2008
Last Modified:	19 Sep 2010 04:46
URI:	http://eprints.iisc.ac.in/id/eprint/14365

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