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Influence of external weld flash on the in-plane plane-strain formability of friction stir welded sheets

Kumar, Mukesh and Kailas, Satish V and Narayanan, Ganesh R (2013) Influence of external weld flash on the in-plane plane-strain formability of friction stir welded sheets. In: JOURNAL OF STRAIN ANALYSIS FOR ENGINEERING DESIGN, 48 (6). pp. 376-385.

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Official URL: http://dx.doi.org/10.1177/0309324713488884

Abstract

The main aim of the present work is to analyze the influence of external weld flash on the formability of friction stir welding sheets through in-plane plane-strain formability tests. The load-extension behavior and forming limit strains are measured to quantify the formability. The influence of friction stir welding parameters on the height of weld flash was also studied. The base materials used for welding trials are AA6061T6 and AA5052H32 alloy sheets of 2.1-mm thickness. It is observed that the influence of external weld flash on the maximum load and total extension for all the friction stir welding conditions is negligible. The effect of weld flash on the limiting major strain is also insignificant. But the presence of weld flash has changed the limiting minor strain, more toward plane-strain condition, indicating the change in strain-path toward plane-strain. This is due to the strain taken by weld flash, along with the major strain, minor strain, and thickness strain in the friction stir welding sheet plane because of constancy of volume. The formation of weld flash and its height are affected synergistically by the axial force and temperature development during friction stir welding. The higher the axial force and temperature, the higher the flash height.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the SAGE PUBLICATIONS LTD, 1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND
Keywords: Friction stir welding; forming limit strain; formability; weld flash
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Depositing User: Id for Latest eprints
Date Deposited: 26 Aug 2015 05:02
Last Modified: 26 Aug 2015 05:02
URI: http://eprints.iisc.ac.in/id/eprint/52213

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