Grain refinement vs. crystallographic texture: Mechanical anisotropy in a magnesium alloy

SCRIPTA MATERIALIA

卷:64

Article

Foley, D. C.¹  Al-Maharbi, M.¹  Hartwig, K. T.^1,2  Karaman, I.^1,2  Kecskes, L. J.³  Mathaudhu, S. N.³ 

[1] Texas A&M Univ, Mat Sci & Engn Program, College Stn, TX 77843 USA

[2] Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA

[3] USA, Res Lab, Weap & Mat Res Directorate, Aberdeen Proving Ground, Aberdeen Proving Ground, MD 21005 USA

关键词: Equal channel angular extrusion/pressing;    Magnesium alloys;    Ultrafine-grained materials;    Anisotropy;    Crystallographic texture;   

DOI  :  10.1016/j.scriptamat.2010.09.042

来源: Elsevier

【 摘 要 】

A magnesium alloy was subjected to severe plastic deformation via an unconventional equal channel angular extrusion route at decreasing temperatures. This method facilitates incremental grain refinement and enhances formability by activating dynamic recrystallization in the initial steps and suppressing deformation twinning. Compression experiments in three orthogonal directions demonstrated high strength levels in the processed sample, up to 350 MPa in yield and 500 MPa in ultimate strengths. Notable flow stress anisotropy is correlated with the processing texture and microstructure. (C) 2010 Published by Elsevier Ltd. on behalf of Acta Materialia Inc.

【 授权许可】

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