Static recrystallization behaviour of cold rolled Mg-Zn-Y alloy and role of solute segregation in microstructure evolution

SCRIPTA MATERIALIA

卷:136

Article

Kim, Yong Min¹  Mendis, Chamini^1,2  Sasaski, Taisuke³  Letzig, Dietmar⁴  Pyczak, Florian⁴  Hono, Kazuhiro³  Yi, Sangbong⁴ 

[1] Korea Inst Mat Sci, 797 Changwondaero, Chang Won 51508, South Korea

[2] Brunel Univ London, BCAST, Kingston Lane, Uxbridge, Middx, England

[3] Natl Inst Mat Sci, 1-2-1 Sengen, Tsukuba, Ibaraki 3050047, Japan

[4] Helmholtz Zentrum Geesthacht, Inst Mat Res, Max Planck Str 1, D-21502 Geesthacht, Germany

关键词: Magnesium alloys;    Shear band;    Recrystallization;    Stacking faults;    Texture;   

DOI  :  10.1016/j.scriptamat.2017.04.001

来源: Elsevier

【 摘 要 】

We examined the microstructure and texture evolution during the recrystallization annealing of cold rolled Mg-1Y and Mg-0.2Zn-1Y alloys. At the early annealing stage, new grains are nucleated on sub-units with 200-300 nm surrounded by dislocation walls within shear bands. The Zn and Y addition reduced the stacking fault energy which results in the high activity of non-basal deformation mechanisms and formation of segregation zones along the stacking faults. This causes the orientation of recrystallization nuclei to be effectively retained so that the texture weakens during the recrystallization without reducing the basal pole split into the sheet transverse direction. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free