Texture and formability studies on AA7020 Al alloy sheets

Shabadi, R and Suwas, S and Kumar, S and Roven, HJ and Dwarkadasa, ES (2012) Texture and formability studies on AA7020 Al alloy sheets. In: Materials Science and Engineering A .

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Abstract

This paper deals with the influence of crystallographic texture on room temperature mechanical behavior of the sheets of the aluminum alloy AA7020 processed to different thicknesses. Three different thicknesses of the alloy sheet, namely 1, 1.85, and 3.6 mm, corresponding to different textures were investigated. Tensile tests were carried out at 0°, 45° and 90° with respect to sheet rolling direction and the resulting in-plane anisotropy in 0.2 proof stress, work hardening and plastic strain ratio (r-value) were determined. Texture derived r-values are also calculated and discussed vis-à -vis the experimentally obtained r-values. Finally the formability of the optimal alloy was studied using forming limit diagrams. Effect of natural aging, with a simulated heat treatment of 70 °C for 2 h on FLD was studied and compared with the as solutionized samples. It was observed that, the strain levels in the bi-axial region of the FLD were not much affected by the heat treatment. © 2012 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Publication:	Materials Science and Engineering A
Publisher:	Elsevier Science
Additional Information:	Copyright for this article belongs to Elsevier Science
Keywords:	7020; Deformation bands; Forming; Marciniak testing; r-value; Texture
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	13 Sep 2012 05:23
Last Modified:	13 Sep 2012 05:23
URI:	http://eprints.iisc.ac.in/id/eprint/45043

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