Strain rate sensitivity of ultrafine grained aluminium alloy AA6061

Vevecka-Priftaj A, Böhner A, May J, Höppel HW, Göken M (2008)

Publication Language: English

Publication Type: Conference contribution

Publication year: 2008

Journal

Materials Science Forum Trans Tech Publications

Publisher: Trans Tech Publications Ltd

Series: Materials Science Forum

Book Volume: 584-586

Pages Range: 741-747

Event location: Goslar DE

ISBN: 9780878493609

DOI: 10.4028/www.scientific.net/msf.584-586.741

Abstract

The strain rate sensitivity of the aluminium alloy AA6061 has been investigated in a conventional grain sized (CG) state and in two different ultrafine grained (UFG) conditions processed by Equal Channel Angular Pressing (ECAP) for 2 and 6 passes at 100°C. Strain rate jump tests in compression were performed at different temperatures and the strain-rate sensitivity exponent m was determined. The tests were accomplished by microstructural investigations before and after compression testing in CG and UFG conditions. It is shown that all UFG microstructures exhibit strongly increased strain-rate sensitivity (SRS) compared to the CG state. The SRS increases with increasing temperature and is more pronounced for the UFG material processed using 6 ECAP passes. The microstructural investigations show a rather high stability of the grain structure for the UFG conditions up to 250°C. The results are discussed with respect to the relevant deformation mechanisms.

Authors with CRIS profile

Heinz Werner Höppel Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Mathias Göken Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Additional Organisation(s)

Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Involved external institutions

Polytechnic University of Tirana (UPT) / Universiteti Politeknik i Tiranës AL Albania (AL)

How to cite

APA:

Vevecka-Priftaj, A., Böhner, A., May, J., Höppel, H.W., & Göken, M. (2008). Strain rate sensitivity of ultrafine grained aluminium alloy AA6061. In Proceedings of the 4th International Conference on Nanomaterials by Severe Plastic Deformation (pp. 741-747). Goslar, DE: Trans Tech Publications Ltd.

MLA:

Vevecka-Priftaj, Aferdita, et al. "Strain rate sensitivity of ultrafine grained aluminium alloy AA6061." Proceedings of the 4th International Conference on Nanomaterials by Severe Plastic Deformation, Goslar Trans Tech Publications Ltd, 2008. 741-747.

BibTeX: Download