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Structure and properties of Mg-Al-Ca alloy after severe plastic deformation

Version 2 2024-06-04, 05:22
Version 1 2015-08-20, 15:33
conference contribution
posted on 2024-06-04, 05:22 authored by SV Dobatkin, Y Estrin, LL Rokhlin, MV Popov, Rimma LapovokRimma Lapovok, TV Dobatkina, VN Timofeev, NI Nikitina
Severe plastic deformation of a Mg-Al-Ca alloy resulted in different types of grain structure. High pressure torsion (HPT) was shown to lead to the formation of a nanocrystalline structure with a grain size of 100-200 nm, while equal channel angular pressing (ECAP) produced ultrafine grained (UFG) or submicrocrystalline (SMC) structures, depending on the ECAP temperature. An UFG structure with a grain size of 2-5 μm was formed at 300°C, as distinct from a finer SMC structure with a grain size of 300-800 nm formed at a lower temperature (220°C). The possibility of increasing the strength of the alloy in the UFG condition by a factor of 1.5-2, combined with a reasonable level of ductility and enhanced functional properties was thus demonstrated. ECAP of annealed Mg-Al-Ca with the formation of UFG structure was shown to lead to increased yield strength (by a factor of 2) and enhanced tensile ductility (by a factor of 3). © 2008 Trans Tech Publications.

History

Volume

584-586 PART 1

Pagination

559-564

Location

Taiyuan, China

Start date

2012-07-13

End date

2012-07-18

ISSN

0255-5476

ISBN-13

9770255547605

Publication classification

E Conference publication, EN.1 Other conference paper

Title of proceedings

Materials Science Forum

Event

Chinese Materials Congress 2012

Publisher

Trans Tech Publications

Place of publication

Durnten-Zurich, Switzerland