Plastic flow properties and microstructural evolution in an ultrafine-grained Al-Mg-Si alloy at elevated temperatures

Kashyap, B. P., Hodgson, P. D., Estrin, Y., Timokhina, I., Barnett, M. R. and Sabirov, I. 2009, Plastic flow properties and microstructural evolution in an ultrafine-grained Al-Mg-Si alloy at elevated temperatures, Metallurgical and materials transactions A – physical metallurgy and materials science, vol. 40, no. 13, pp. 3294-3303, doi: 10.1007/s11661-009-0036-6.

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Title Plastic flow properties and microstructural evolution in an ultrafine-grained Al-Mg-Si alloy at elevated temperatures
Author(s) Kashyap, B. P.
Hodgson, P. D.
Estrin, Y.
Timokhina, I.ORCID iD for Timokhina, I. orcid.org/0000-0003-1989-0835
Barnett, M. R.ORCID iD for Barnett, M. R. orcid.org/0000-0001-8287-9044
Sabirov, I.
Journal name Metallurgical and materials transactions A – physical metallurgy and materials science
Volume number 40
Issue number 13
Start page 3294
End page 3303
Total pages 10
Publisher Springer
Place of publication New York, N.Y.
Publication date 2009-12
ISSN 1073-5623
1543-1940
Keyword(s) ultrafine-grained alloy
microstructural evolution
heat treatment
Summary An AA6082 alloy was subjected to eight passes of equal channel angular pressing at 100 °C, resulting in an ultrafine grain size of 0.2 to 0.4 µm. The tensile deformation behavior of the material was studied over the temperature range of 100 °C to 350 °C and strain rate range of 10¯4 to 10¯11. The evolution of microstructure under tensile deformation was investigated by analyzing both the deformation relief on the specimen surface and the dislocation structure. While extensive microshear banding was found at the lower temperatures of 100 °C to 150 °C, deformation at higher temperatures was characterized by cooperative grain boundary sliding and the development of a bimodal microstructure. Dislocation glide was identified as the main deformation mechanism within coarse grains, whereas no dislocation activity was apparent in the ultrafine grains.
Language eng
DOI 10.1007/s11661-009-0036-6
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 861101 Basic Aluminium Products
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
HERDC collection year 2009
Copyright notice ©2009, Springer
Persistent URL http://hdl.handle.net/10536/DRO/DU:30026210

Document type: Journal Article
Collections: Centre for Material and Fibre Innovation
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