Effect of Ag addition on the elevated-temperature mechanical properties of an extruded high strength Mg-Gd-Y-Zr alloy

被引：34
|
作者：
Movahedi-Rad, A. [1 ]
Mahmudi, R. [1 ]
机构：
[1] Univ Tehran, Sch Met & Mat Engn, Coll Engn, Tehran, Iran
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2014年 / 614卷
基金：
美国国家科学基金会;
关键词：
Mg-Gd-Y-Zr alloy; Shear strength; Particle strengthening; AM60 MAGNESIUM ALLOY; SHEAR-PUNCH; HARDENING RESPONSE; CREEP RESISTANCE; MICROSTRUCTURE; TENSILE; BEHAVIOR; ZN; CA;
D O I：
10.1016/j.msea.2014.07.022
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Elevated-temperature mechanical properties of the extruded Mg-8.5Gd-2.5Y-0.5Zr (wt%) and Mg-8.5Gd-2.5Y-0.5Zr-2Ag (wt%) alloys were investigated by the shear punch test (SPT) in the temperature range of 25-300 degrees C. The average sizes of the dynamically recrystallized grains of the Ag-free and Ag-containing alloys were about 8 and 3 mu m, respectively. Addition of Ag to the base alloy led to the formation of a new intermetallic phase with a composition close to Mg16Gd2YAg, and increased the volume fraction of the second phase particles from 2.5% to about 13%. This together with the refinement of microstructure resulted in superior mechanical properties of the Ag-containing alloy over the base material in the whole temperature range studied. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：62 / 66
页数：5
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