High strength Mg-9Al serial alloy processed by slow extrusion

被引：78

作者：

Kang, Jin-wen ^{[1
]}

Sun, Xue-fei ^{[1
]}

Deng, Kun-kun ^{[1
]}

Xu, Fang-jun ^{[1
]}

Zhang, Xiao ^{[1
]}

Bai, Yan ^{[1
]}

机构：

[1] Taiyuan Univ Technol, Coll Mat Sci & Engn, Shanxi Key Lab Adv Magnesium Based Mat, Taiyuan 030024, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2017年 / 697卷

基金：

中国国家自然科学基金;

关键词：

Magnesium; Extrusion; Dynamic precipitation; Microstructure; Mechanical properties; IMPROVED MECHANICAL-PROPERTIES; AZ91 MAGNESIUM ALLOY; HIGH-SPEED EXTRUSION; AL-SN ALLOYS; CA-MN ALLOY; MG17AL12; PHASES; ZN ALLOY; MICROSTRUCTURE; PRECIPITATION; COMPOSITES;

D O I：

10.1016/j.msea.2017.05.017

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The AZ91-0.5Ca alloy was extruded at 250 degrees C with slow extrusion speed (0.03, 0.3, 3 mm/s) in the current study. The results showed that both the volume fraction and average grain size of DRXed grains increased with the increase of extrusion speed. Furthermore, numerous fine Mg17Al12 phase were observed in the DRXed regions of the extruded alloys, the amount of which decreased by increasing extrusion speed. The decrease of extrusion speed led to the improvement of yield strength and ultimate tensile strength, however, at the expense of elongation. As the extrusion speed decreased to 0.03 mm/s, the yield strength, ultimate tensile strength and elongation of present alloy were similar to 347.8 MPa, similar to 402.2 MPa and similar to 9.1%, respectively, which were superior to the present commercial Mg-Al serial alloys. Detailed reasons are given and analyzed.

引用

页码：211 / 216

页数：6

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