Study on the formation of new Mg-Cu-Ti-Y quaternary bulk metallic glasses with high mechanical strength

被引：12

作者：

Liu, G. B. ^{[1
]}

Gao, P. ^{[1
]}

Xue, Z. ^{[1
]}

Yang, S. Q. ^{[1
]}

Zhang, M. L. ^{[1
]}

机构：

[1] Harbin Engn Univ, Key Lab Superlight Mat & Surface Technol, Minist Educ, Harbin 150001, Heilongjiang, Peoples R China

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2012年 / 358卷 / 23期

关键词：

Mg-based alloys; Bulk metallic glasses; Glass forming ability; Mechanical properties; FORMING ABILITY; AMORPHOUS-ALLOYS; COMPRESSIVE STRENGTH; CASTING METHOD; SOLID ALLOYS; PLASTICITY; AG; ZR; CRYSTALLIZATION; TRANSITION;

D O I：

10.1016/j.jnoncrysol.2012.09.019

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

New Mg-Cu-Ti-Y quaternary bulk metallic glasses (BMGs) with diameter of 2 mm have been designed and successfully fabricated by conventional copper mold casting method. The X-ray diffractometer (XRD) and differential scanning calorimeter (DSC) examinations indicate that the as-cast Ti-containing Mg60Cu30-xTixY10 (x = 3, 5, 8 at.%) alloys possess completely amorphous structures and large supercooled liquid region (5964 K). The mechanical property testings demonstrate that this kind of new BMGs also have high compressive fracture strength (sigma(f)), big elastic strain (epsilon(e)), high Vickers hardness (Hv) and low elastic modulus (E). There-into, the sigma(f), epsilon(e), Hv and E values of the as-cast Mg60Cu27Ti3Y10 BMG sample reach up to 879 MPa, 3.04%, 347 and 34 GPa, respectively, which are much superior to the as-cast Ti-free Mg60Cu30Y10 BMG. The as-cast alloys' fracture surface morphologies and dominant fracture behaviors have also been characterized and explained in detail. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：3084 / 3088

页数：5

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