Investigation on the inhomogeneous structure of metallic glasses based on the initial elastic deformation in nanoindentation

被引：6

作者：

Zhao, L. ^{[1
]}

Ma, C. L. ^{[1
]}

Fu, M. W. ^{[2
]}

Zeng, X. R. ^{[3
]}

机构：

[1] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China

[2] Hong Kong Polytech Univ, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China

[3] Shenzhen Univ, Coll Mat Sci & Engn, Shenzhen 518060, Peoples R China

来源：

INTERMETALLICS | 2012年 / 30卷

关键词：

Glasses; metallic; Mechanical properties at ambient temperature; Elastic properties; Mechanical testing; ORDER;

D O I：

10.1016/j.intermet.2012.03.036

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The initial elastic deformation of bulk metallic glasses (BMGs) with various casting diameters and annealing conditions was investigated by nanoindentation test with a spherical indenter. It was found that with the increasing of the glassy rod diameter and the annealing temperature, the onset slope of nanoindentation plot remarkably increased. The BMGs with various casting diameters and annealing temperatures are of different atomic configuration due to their different cooling rate during casting and different structural relaxation processes during annealing, respectively, indicating that the onset slope of nanoindentation plot is strangely dependent on the atomic configuration. Therefore, the onset slope of nanoindentation plot may serve as an indicator of the initial deformation behavior of BMGs. The structual origin of the initial elastic deformation was discussed in terms of short order nature in glasses and the distribution of free volume. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：65 / 71

页数：7

共 22 条

[1]

[Anonymous], ASM HDB

[2] Theoretical strength and the onset of plasticity in bulk metallic glasses investigated by nanoindentation with a spherical indenter [J].

Bei, H ;

Lu, ZP ;

George, EP .

PHYSICAL REVIEW LETTERS, 2004, 93 (12) :125504-1

[3] Atomistic model of amorphous materials [J].

Fan, Cang ;

Liaw, P. K. ;

Liu, C. T. .

INTERMETALLICS, 2009, 17 (1-2) :86-87

[4] Direct observation of local atomic order in a metallic glass [J].

Hirata, Akihiko ;

Guan, Pengfei ;

Fujita, Takeshi ;

Hirotsu, Yoshihiko ;

Inoue, Akihisa ;

Yavari, Alain Reza ;

Sakurai, Toshio ;

Chen, Mingwei .

NATURE MATERIALS, 2011, 10 (01) :28-33

[5] Crystallization process and glass stability of an Fe48Cr15Mo14C15B6Tm2 bulk metallic glass [J].

Hirata, Akihiko ;

Hirotsu, Yoshihiko ;

Amiya, Kenji ;

Inoue, Akihisa .

PHYSICAL REVIEW B, 2008, 78 (14)

[6] Bulk metallic glasses: Smaller is softer [J].

Huang, Y. J. ;

Shen, J. ;

Sun, J. F. .

APPLIED PHYSICS LETTERS, 2007, 90 (08)

[7] Fe- and Co-based bulk glassy alloys with ultrahigh strength of over 4000 MPa [J].

Inoue, A. ;

Shen, B. L. ;

Chang, C. T. .

INTERMETALLICS, 2006, 14 (8-9) :936-944

[8] Preparation and thermal stability of bulk amorphous Pd40Cu30Ni10P20 alloy cylinder of 72 mm in diameter [J].

Inoue, A ;

Nishiyama, N ;

Kimura, H .

MATERIALS TRANSACTIONS JIM, 1997, 38 (02) :179-183

[9] Recent progress in bulk glassy alloys [J].

Inoue, A ;

Takeuchi, A .

MATERIALS TRANSACTIONS, 2002, 43 (08) :1892-1906

[10]

Johnson K.L., 1985, CONTACT MECH, P93

← 1 2 3 →