Deakin University
Browse

File(s) under permanent embargo

Processing and properties of ultrafine-grain aluminium alloy 6111 sheet

journal contribution
posted on 2008-05-08, 00:00 authored by Rimma Lapovok, Ilana Timokhina, P W J McKenzie, R O'Donnell
The equal channel angular processing (ECAP) technique has been applied to an automotive aluminium alloy sheet (A6111). The technique utilizes a machine that was specially designed for this purpose at Monash University. It was determined that ECAP is able to refine the grain size of the sheet, diminish the detrimental as-rolled texture components in the sheet and retain an acceptable level of bi-axial ductility such as is required during the automotive forming process. Experiments were carried out on annealed, as-received sheets that were subjected to either one or two passes through the ECAP machine. For the second ECAP pass, the sheet could be processed in the same orientation as the first pass (route A) or it could be rotated 180° about the direction of feeding (route C). It was determined that route A produced marginally improved properties compared to sheet processed via route C, and that due to the frictional heating generated during the second pass, a significant amount of recovery occurred in the sheet such that an improved combination of texture and formability resulted after two passes compared to the same sheet exposed to only a single pass.

History

Journal

Journal of materials processing technology

Volume

200

Issue

1-3

Pagination

441 - 450

Publisher

Elsevier

Location

Amsterdam, The Netherlands

ISSN

0924-0136

Language

eng

Publication classification

C Journal article; C1.1 Refereed article in a scholarly journal

Copyright notice

2007, Crown Copyright