Microstructure evolution and mechanical properties of quasicrystal-reinforced Mg-Zn-Gd alloy processed by cyclic extrusion and compression

被引：74
|
作者：
Tian, Yuan
Huang, Hua
Yuan, Guangyin [1 ]
Ding, Wenjiang
机构：
[1] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloy Net Forming, Shanghai 200240, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 626卷
关键词：
Magnesium alloys; Cyclic extrusion compression (CEC); Microstructure; Quasicrystalline; Mechanical properties; HIGH-TEMPERATURE DEFORMATION; DYNAMIC RECRYSTALLIZATION; TEXTURE EVOLUTION; ROOM-TEMPERATURE; MAGNESIUM ALLOYS; Y ALLOYS; PARTICLES; DUCTILITY; BEHAVIOR; AZ31;
D O I：
10.1016/j.jallcom.2014.11.167
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：
Mg-1.5Zn-0.25Gd (at.%) alloy reinforced by icosahedral quasicrystalline phase (I-phase) was fabricated and subjected to cyclic extrusion and compression (CEC) at 350 degrees C to investigate the microstructure evolution during CEC and its effect on the mechanical properties. It is observed that, during CEC, the microstructure of the alloy was greatly refined by dynamic recrystallization (DRX), large numbers of I-phase particles precipitated and then grew up, the texture of the alloy was obviously weakened. These changes in microstructure improved the mechanical properties of the alloy significantly and the alloy processed by 8 passes CEC exhibited outstanding plasticity of 31.4% and moderate yield strength of 161 MPa. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：42 / 48
页数：7
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