High specific strength Mg-based bulk metallic glass matrix composite highly ductilized by Ti dispersoid

被引：52

作者：

Kinaka, Makoto ^{[2
]}

Kato, Hidemi ^{[1
]}

Hasegawa, Masashi ^{[1
]}

Inoue, Akihisa ^{[1
]}

机构：

[1] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

[2] Tohoku Univ, Grad Sch Engn, Dept Mat Sci & Engn, Sendai, Miyagi 9808579, Japan

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2008年 / 494卷 / 1-2期

关键词：

Mg-based alloy; Bulk metallic glass matrix composite; High specific strength;

D O I：

10.1016/j.msea.2008.04.039

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Mg-based bulk metallic glass matrix composite with hcp-Ti powders was fabricated by casting the mixtures of Mg65Cu25Gd10 molten alloy and pure Ti powders into a copper mold. Ti powder was spherical and less than 150 mu m in diameter, and its volume fraction was controlled from 5 to 40%. Thermal stability of the glassy matrix was maintanied even in the coexistence with the Ti powders. However, Ti dispersoid caused a significant improvement on compressive ductility from 0% plastic deformation for the monolithic glass to 41% plastic deformation for the composite with 40vol.% Ti powders. This is the first success of synthesizing Mg-based alloys with high ultimate strength of similar to 900 MPa level as well as the large plastic deformation of similar to 40%, and suggests a novel guideline to develop Mg-based alloys having high specific strength with high ductility. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：299 / 303

页数：5

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