A new insight into LPSO transformation during multi-axial forging in Mg-Gd-Y-Zn-Zr alloy

被引：21
作者：
Ramezani, S. M. [1 ]
Zarei-Hanzaki, A. [1 ]
Anoushe, A. S. [1 ]
Abedi, H. R. [1 ]
Minarik, P. [2 ]
Mathis, K. [2 ]
Fekete, K. Horvath [2 ]
机构：
[1] Univ Tehran, Coll Engn, Sch Met & Mat Engn, Tehran, Iran
[2] Charles Univ Prague, Fac Math & Phys, Ke Karlovu 3, Prague 12116 2, Czech Republic
来源：
MATERIALS LETTERS | 2020年 / 269卷 / 269期
关键词：
Magnesium; LPSO structure; Microstructure; Phase transformation; Deformation-assisted transformation; MECHANICAL-PROPERTIES; MICROSTRUCTURE EVOLUTION; MAGNESIUM ALLOY; DEFORMATION;
D O I：
10.1016/j.matlet.2020.127625
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Long period stacking ordering (LPSO) significantly enhances the mechanical properties of magnesium alloys. Herein, for the first time, the effect of thermo-mechanical processing on the transformation of the LPSO during multi-axial forging at 400 degrees C has been addressed. Interestingly, a considerable growth of the lamellar LPSO from blocky phase and the transformation of blocky LPSO to Mg5Gd are recognized as a deformation-assisted evolutions. Covering the grains by the lamellar LPSO after 3 MAF passes is quite surprising, owing to short-time preheating/heating and relatively low temperature. It is justified through the development of (i) high-track diffusion and (ii) proper original grain orientation for propagation of LPSO lamellae, stemming from large imposed strain through MAF process. (C) 2020 Elsevier B.V. All rights reserved.
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页数：5
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