Title: A process for increasing plastic strain ratio of AA1050 Al alloy sheet

Authors: Gwang-Hee Kim; Su Kwon Nam; Dong Nyung Lee; Insoo Kim

Addresses: School of Advanced Materials Science and Engineering, Kumoh National Institute of Technology, Gumi, Gyung Buk, 39177, Korea; Daeshin Metal, Changwon, Gyeongnam, P.O. Box 374, Korea ' School of Advanced Materials Science and Engineering, Kumoh National Institute of Technology, Gumi, Gyung Buk, 39177, Korea ' Department of Materials Science and Engineering and RIAM, Seoul National University, Seoul, 08826, Korea ' School of Advanced Materials Science and Engineering, Kumoh National Institute of Technology, Gumi, Gyung Buk, 39177, Korea

Abstract: The process of heavy asymmetric rolling (90%) and annealing, followed by light rolling (10%-25%) and annealing has been known to improve the plastic strain ratios (the R-values) of AA1050 Al alloy sheets. The thickness of 90% asymmetrically rolled sheet is so thin that it is difficult to control the light rolling reduction. In order to better control the light rolling reduction, the heavy asymmetric rolling reduction was reduced to 60% in this study. The Al alloy sheets processed by the heavy asymmetric rolling (60%) and annealing, followed by light rolling (10%-25%) and annealing were subjected to the texture measurement. The R-values of the sheets were calculated from the measured sheet textures using the Bunge method. AA1050 Al alloy sheets processed by the 60% heavy asymmetric rolling and annealing for 1 h at 400°C, followed by 15% light rolling and annealing for 1 h at 400°C had an average R-value of 1.05, which is about 1.86 times higher than that of the initial sample.

Keywords: AA1050 Al alloy sheet; asymmetric rolling; shear texture; annealing; plastic strain ratio; aluminium alloys.

DOI: 10.1504/IJMPT.2017.080559

International Journal of Materials and Product Technology, 2017 Vol.54 No.1/2/3, pp.202 - 211

Received: 17 Jul 2015
Accepted: 23 Sep 2015

Published online: 31 Oct 2016 *

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