Strengthening and toughening of Mg-Cu-(Y, Gd) bulk metallic glasses by minor addition of Be

被引：19

作者：

Li, Z. G. ^{[1
]}

Hui, X. ^{[1
]}

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

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

Chen, G. L. ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

来源：

MATERIALS LETTERS | 2007年 / 61卷 / 28期

基金：

中国国家自然科学基金;

关键词：

Mg base alloys; bulk metallic glasses; glass-forming ability; compressive strength;

D O I：

10.1016/j.matlet.2007.03.102

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Mg65Cu25Re10 and Mg65Cu24Be1Re10 (Re=Y, Gd) bulk metallic glasses (BMGs) were successfully fabricated by conventional Cu-mold casting method. By the addition of 1 at.% Be, the compressive strengths of Mg65Cu24Be1Y10 and Mg65Cu24Be1Gd10 alloys are increased from 760 MPa and 860 MPa to 930 MPa and 1025 MPa, respectively. The fracture morphology is changed from nanometer scale corrugation to micrometer scale dimple and vein pattern, indicating that the addition of minor Be obviously improves the toughness of the alloys. The fracture morphologies with different size of plastic zone in Mg-based BMGs provide probability for understanding the fracture mechanism of BMGs. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：5018 / 5021

页数：4

共 23 条

[1] Glass breaks like metal, but at the nanometer scale -: art. no. 075504 [J].

Célarié, F ;

Prades, S ;

Bonamy, D ;

Ferrero, L ;

Bouchaud, E ;

Guillot, C ;

Marlière, C .

PHYSICAL REVIEW LETTERS, 2003, 90 (07) :4

[2] Fracture of silicate glasses: Ductile or brittle? [J].

Guin, JP ;

Wiederhorn, SM .

PHYSICAL REVIEW LETTERS, 2004, 92 (21) :215502-1

[3] Formation, microstructure and properties of long-period order structure reinforced Mg-based bulk metallic glass composites [J].

Hui, X. ;

Dong, W. ;

Chen, G. L. ;

Yao, K. F. .

ACTA MATERIALIA, 2007, 55 (03) :907-920

[4] MG-CU-Y AMORPHOUS-ALLOYS WITH HIGH MECHANICAL STRENGTHS PRODUCED BY A METALLIC MOLD CASTING METHOD [J].

INOUE, A ;

KATO, A ;

ZHANG, T ;

KIM, SG ;

MASUMOTO, T .

MATERIALS TRANSACTIONS JIM, 1991, 32 (07) :609-616

[5] Stabilization of metallic supercooled liquid and bulk amorphous alloys [J].

Inoue, A .

ACTA MATERIALIA, 2000, 48 (01) :279-306

[6]

Kelly A., 1967, PHILOS MAG, V15, P576

[7]

LI ZG, IN PRESS J ALLOYS CO

[8] Fabrication of ternary Mg-Cu-Gd bulk metallic glass with high glass-forming ability under air atmosphere [J].

Men, H ;

Kim, DH .

JOURNAL OF MATERIALS RESEARCH, 2003, 18 (07) :1502-1504

[9] Effect of Ag addition on the improvement of glass-forming ability and plasticity of Mg-Cu-Gd bulk metallic glass [J].

Park, ES ;

Lee, JY ;

Kim, DH .

JOURNAL OF MATERIALS RESEARCH, 2005, 20 (09) :2379-2385

[10] Formation of Mg-Cu-Ni-Ag-Zn-Y-Gd bulk glassy alloy by casting into cone-shaped copper mold in air atmosphere [J].

Park, ES ;

Kim, DH .

JOURNAL OF MATERIALS RESEARCH, 2005, 20 (06) :1465-1469

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