The effect of twinning on dynamic recrystallization behavior of Mg-Gd-Y alloy during hot compression

被引：49

作者：

Lu, S. H. ^{[1
,2
]}

Wu, D. ^{[1
]}

Chen, R. S. ^{[1
]}

Han, En-hou ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Grp Magnesium Alloys & Their Applicat, 62 Wencui Rd, Shenyang 110016, Liaoning, Peoples R China

[2] Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 803卷

基金：

中国国家自然科学基金;

关键词：

Mg-Gd-Y alloy; Hot compression; Twinning; DRX; Schmid factor; MECHANICAL-PROPERTIES; ZR ALLOY; DEFORMATION-BEHAVIOR; MAGNESIUM ALLOY; GRAIN-SIZE; TEXTURE; MICROSTRUCTURE; EVOLUTION; TWINS; DISLOCATIONS;

D O I：

10.1016/j.jallcom.2019.06.279

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effects of twinning on the dynamic recrystallization (DRX) of the Mg-6.58Gd-5.7Y-0.55Zr alloy were investigated through uniaxial compression tests at 400 degrees C and 450 degrees C with an initial strain rate of 0.001-0.1 s(-1) and were characterized through optical microscopy (OM), scanning electron microscopy (SEM), electron back-scattering diffraction (EBSD) and transmission electron microscopy (TEM). At a relatively high strain rate, extension twins can mainly be activated during the initial stage of hot compression, and the subsequent DRX is closely related to the twin-twin and twin-dislocation interactions. The intersected twin boundaries of the extension twins from multiple twin variants may provide effective DRX sites and promote microstructure refinement. However, extension twins from a single twin variant pair may quickly grow, soon swallowing the matrix and decreasing the DRX efficiency. (C) 2019 Elsevier B.V. All rights reserved.

引用

页码：277 / 290

页数：14

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