Effect of pre-solution treatment on mechanical properties of as-extruded Mg96.9Zn0.43Gd2.48Zr0.15 alloy

被引：13

作者：

Wen, Kai ^{[1
]}

Liu, Ke ^{[1
]}

Wang, Zhaohui ^{[1
]}

Li, Shubo ^{[1
]}

Du, Wenbo ^{[1
]}

机构：

[1] Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2016年 / 674卷

基金：

北京市自然科学基金;

关键词：

Mg-Zn-Gd-Zr alloys; Long period stacking ordered; Kinking band; Mechanical properties; STACKING ORDERED PHASE; SOLIDIFIED MG97ZN1Y2 ALLOY; ZN-ZR ALLOY; MICROSTRUCTURE EVOLUTION; WT.PERCENT ALLOY; HIGH-TEMPERATURE; MAGNESIUM ALLOY; HEAT-TREATMENT; GD ALLOYS; MG ALLOY;

D O I：

10.1016/j.msea.2016.07.073

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effect of pre-solution (T4) treatment on microstructure and mechanical properties of the as-extruded Mg96.9Zn0.43Gd2.48Zr0.15 alloy was investigated. The results suggested that the long period stacking ordered (LPSO) structure with a lamellar-shape morphology transformed from the decomposition of the primary Mg3Gd-type phase after the pre-solution (T4) treatment at 773 K for 12 h, and then grown into the block-shape LPSO structure until 120 h. The kinking band deformation occurred in the lamellar-shape and the block-shape LPSO structure during hot extrusion (HE). The morphologies and their kinking band of the LPSO structures influenced mechanical properties of the as-extruded alloys greatly. The best mechanical properties were found in the alloy B (T4 for 12 h+HE), which was ascribed to the lamellar shape LPSO structure and its kinking deformation. Nevertheless, the mechanical properties of the alloy (T4 for 70 h+HE and 120 h+HE) decreased because of the fracture of the block-shape LPSO structure. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：33 / 39

页数：7

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