The effect of double extrusion on the microstructure and mechanical properties of Mg-Zn-Ca alloy

被引：60

作者：

Du, Y. Z. ^{[1
]}

Zheng, M. Y. ^{[1
]}

Qiao, X. G. ^{[1
]}

Wu, K. ^{[1
]}

Liu, X. D. ^{[2
]}

Wang, G. J. ^{[2
]}

Lv, X. Y. ^{[2
]}

Li, M. J. ^{[3
]}

Liu, X. L. ^{[3
]}

Wang, Z. J. ^{[3
]}

Liu, Y. T. ^{[3
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China

[2] Northeast Light Alloy Co Ltd, Harbin 150060, Peoples R China

[3] China Inst Atom Energy, Beijing 102413, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2013年 / 583卷

关键词：

Mg-Zn-Ca alloy; Double extrusion; Grain refinement; Mechanical properties; MAGNESIUM-BASED ALLOYS; GRAIN-SIZE; ELEVATED-TEMPERATURES; DEFORMATION-BEHAVIOR; TENSILE PROPERTIES; HIGH-STRENGTH; MN ALLOYS; RECRYSTALLIZATION; TEXTURE; REFINEMENT;

D O I：

10.1016/j.msea.2013.06.054

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The Mg-4.50Zn-1.13Ca (wt%) alloy was subjected to double extrusion, and the microstructure and mechanical properties of the extruded alloys were investigated. Double extrusion refined the microstructure significantly, resulting in the enhancement of mechanical properties of the double-extruded alloys compared with the single-extruded alloy. The yield strength of the single-extruded alloy was 173 MPa, while the value was increased to 320 MPa and 370 MPa after subsequent second extrusion at 300 degrees C and 250 degrees C, respectively. The second extrusion ratio had little effect on the microstructure and mechanical properties of the double-extruded alloys, while grain size was decreased and strength was increased with the decrease of double extrusion temperature. The double-extruded Mg-Zn-Ca alloy exhibited superior elevated temperature mechanical properties, which was attributed to the fine stable Ca2Mg6Zn3 intermetallic compound particles dispersed in the alloy. (c) 2013 Elsevier B.V. All rights reserved.

引用

页码：69 / 77

页数：9

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