Effect of Si addition on microstructure and properties of magnesium alloys with high Al and Zn contents

被引：47
作者：
Wang, M. [1 ]
Xiao, D. H. [1 ,2 ]
Liu, W. S. [1 ,2 ]
机构：
[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China
[2] Cent S Univ, Sci & Technol High Strength Struct Mat, Changsha 410083, Hunan, Peoples R China
来源：
VACUUM | 2017年 / 141卷
关键词：
Degradable magnesium alloys; Microstructure; Mechanical properties; Corrosion behavior; DIE-CAST MAGNESIUM; CORROSION BEHAVIOR; MECHANICAL-PROPERTIES; MG2SI PARTICLES; TEMPERATURE; STRENGTH; MODULUS; AZ91;
D O I：
10.1016/j.vacuum.2017.04.005
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In order to assess the possibility of using magnesium alloys with high Al and Zn contents as degradable fracturing balls, the effects of Si addition on microstructures, mechanical properties and degradable behavior of Mg-17A1-5Zn (mass.%) alloy were investigated. The results show that the minor Si addition can refine alpha-Mg matrix and modify Mg2Si particles. With the increase of Si content, the yield strength of the alloys initially increases and reaches to the maximum 309 MPa in alloy containing 0.5 wt % Si. The degradable corrosion rate exhibits an inverse trend and reaches the maximum in alloy containing 3 wt % Si with 0.46 mm/day at 298 K and 5.39 mm/day at 366 K, respectively. 2017 Elsevier Ltd. All rights reserved.
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页码：144 / 151
页数：8
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