Thermally-activated flow in nominally binary Al-Mg alloys

SCRIPTA MATERIALIA

卷:111

Article

Leyson, G. P. M.¹  Curtin, W. A.² 

[1] Max Planck Inst Eisenforsch GmbH, D-40237 Dusseldorf, Germany

[2] Ecole Polytech Fed Lausanne, Inst Engn Mech, CH-1015 Lausanne, Switzerland

关键词: Flow stress;    Solute strengthening;    Dislocation;    Modeling;   

DOI  :  10.1016/j.scriptamat.2015.08.020

来源: Elsevier

【 摘 要 】

The temperature-dependent flow behavior in nominally binary Al-Mg alloys measured recently (Jobba etal., 2015; Niewczas et al., 2015) is interpreted in the context of a parameter-free solute strengthening model. The recent measurements show consistently higher strengths as compared to literature data on true binary Al-Mg alloys, which is attributed to the presence of Fe in the nominally binary Al-Mg. Using the Fe concentration as a single fitting parameter, the model predictions for the newer materials when treated as Al-Mg-(Fe) alloys agree with experiments to the same degree as obtained for the true binary Al-Mg. The model then predicts the activation volume in good agreement with experimental trends. (c) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free