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Influence of tool geometry in friction stir welding

Kumar, K and Kailas, Satish V and Srivatsan, TS (2008) Influence of tool geometry in friction stir welding. In: Materials and Manufacturing Processes, 23 (2). pp. 188-194.

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Abstract

In this article we highlight the results of a recent study undertaken to understand the influence of tool geometry on friction stir welding (FSW) of an aluminum alloy with specific reference to microstructural development, defect formation, and mechanical response. The welding trials were made on 4.4 mm thick sheets using tools made of die steel and having different diameters of the shoulder and the pin, and the profile of the pin. Throughout the welding operation, the rotational speed, traverse speed, and tool axial tilt were held constant at 1400 rpm, 80 mm/minute, and 0 degrees, respectively. For a shoulder diameter of 20 mm and a pin diameter of 6 mm, the severity of defects in the weld was found to be the least and the resultant tensile strength of the weld was high. For the welds that were made using a tool having a shoulder diameter of 10 mm and a pin diameter of 3 mm the tensile strength of the weld was the least since the degree of defects observed were higher.

Item Type: Journal Article
Additional Information: This article copyright belongs to Taylor & Francis.
Keywords: Aluminum alloys; Butt joints; Defects; Fracture characteristics; Friction stir welding; Grain growth; Heat affected zone; Heat input; Mechanical properties; Microstructure; Over-ageing; Precipitation hardening; Trans weld tensile testing; Tool geometry; Weld base material interfaces
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 18 Feb 2008
Last Modified: 27 Aug 2008 13:11
URI: http://eprints.iisc.ernet.in/id/eprint/13064

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