Tensile and creep behaviors of Mg-5Zn-2.5Er alloy improved by icosahedral quasicrystal

被引：22

作者：

Li, Jianhui ^{[1
]}

Du, Wenbo ^{[1
]}

Li, Shubo ^{[1
]}

Wang, Zhaohui ^{[1
]}

机构：

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

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2010年 / 527卷 / 4-5期

关键词：

Magnesium alloy; Erbium; Tensile; Creep; ZN-Y ALLOYS; MECHANICAL-PROPERTIES; RARE-EARTH; MAGNESIUM ALLOYS; LAVES PHASES; MICROSTRUCTURE; PARTICLES; EXTRUSION; ADDITIONS; STRENGTH;

D O I：

10.1016/j.msea.2009.10.006

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The tensile and tensile creep properties of the as-cast Mg-5Zn-2.5Er (in wt.%) alloy strengthened by icosahedral quasicrystalline phase (1-phase) were studied. The Mg-5Zn-2.5Er alloy had better tensile properties both at room temperature and 175 degrees C than AE42 and Mg-5Zn alloys. Compared to AE42 alloy, the as-cast Mg-5Zn-2.5Er alloy had smaller steady-state creep rate and total creep strain under the creep conditions of 175 degrees C and 70 MPa for 100 h. The better creep resistance of the Mg-5Zn-2.5Er was mainly due to the formation of I-phase with high-thermal stability distributed along grain boundary. Moreover, microstructure analysis indicated that some fine precipitates in the alpha-Mg matrix can pin the dislocation effectively, improving the creep resistance of the alloy. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1255 / 1259

页数：5

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