Microstructure and Mechanical Properties of an Extruded Mg-1.58Zn-0.52Gd Alloy

被引：3

作者：

Jiang, M. G. ^{[1
,2
]}

Chen, J. C. ^{[3
]}

Yan, H. ^{[1
]}

Xu, C. ^{[4
]}

Nakata, T. ^{[4
]}

Kamado, S. ^{[4
]}

机构：

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

[2] Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing 100049, Peoples R China

[3] Xi An Jiao Tong Univ, Sch Chem Engn & Technol, 28 Xianning West Rd, Xian 710049, Peoples R China

[4] Nagaoka Univ Technol, Dept Mech Engn, Nagaoka, Niigata 9402188, Japan

来源：

MAGNESIUM TECHNOLOGY 2017 | 2017年

基金：

中国国家自然科学基金;

关键词：

Magnesium alloy; Extrusion; Microstructure; Mechanical properties; ROOM-TEMPERATURE DUCTILITY; ZN-GD ALLOYS; GRAIN-SIZE; MG; TEXTURE; EXTRUSION; DEFORMATION; MG-3AL-1ZN; SIMULATION; BEHAVIOR;

D O I：

10.1007/978-3-319-52392-7_43

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Mg-1.58Zn-0.52Gd (wt%) alloy was indirectly extruded at different temperatures and the resulting microstructure, texture and mechanical properties were investigated. The alloy extruded at 350 degrees C exhibited a typical bimodal microstructure, consisting of fine dynamically recrystallized (DRXed) grains of similar to 3.1 mu m and coarse unDRXed grains elongated along the ED with many fine spherical Mg3Zn3Gd2 phase, and a strong [10 (1) over bar0] fiber texture, thereby resulting in high yield strength of 283 MPa and low elongation of 10.0%. With increasing extrusion temperature, the yield strength gradually decreased mainly due to increased DRXed grain size from the Hall-Petch relation, and the elongation increased due to the weakened extrusion texture and increased DRX fraction, suppressing crack initiation at twins in coarse unDRXed grains. As a result, the alloy extruded at 400 degrees C showed yield strength of 161 MPa and elongation of 24.7%.

引用

页码：297 / 301

页数：5

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