Hidden order in the fracture surface morphology of metallic glasses

被引：33

作者：

Gao, M. ^{[1
]}

Sun, B. A. ^{[1
]}

Yuan, C. C. ^{[1
]}

Ma, J. ^{[1
]}

Wang, W. H. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

来源：

ACTA MATERIALIA | 2012年 / 60卷 / 20期

关键词：

Metallic glass; Fracture surface morphology; Fractal nature of dimple structure; STOCHASTIC DISLOCATION DYNAMICS; ELASTIC PROPERTIES; DEFORMATION; TOUGHNESS; BEHAVIOR;

D O I：

10.1016/j.actamat.2012.08.046

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

We report the fractal nature of dimple structures on the fracture surface of various metallic glasses (MGs) with significantly different mechanical properties. The analyzed fractal dimension increments of MGs lie in a narrow range of 0.6-0.8. The results indicate that the MGs with marked differences in plasticity and toughness may have a unified local softening mechanism and similar nonlinear plastic behavior in front of the crack tip during fracture. We present a physical picture for the dimple structure formation from the plastic zone in front of the crack tip. The evolution of the plastic zone from the interaction of the shear transformation zones is theoretically modeled as a stochastic process far from thermodynamic equilibrium, and the model can capture the formation and fractal nature of the dimple structures on the fracture surface of metallic glasses. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：6952 / 6960

页数：9

共 40 条

[1]

Fractal characteristics of an asphaltene deposited heterogeneous surface [J].

Amin, J. Sayyad ;

Ayatollahi, Sh. ;

Alamdari, A. .

APPLIED SURFACE SCIENCE, 2009, 256 (01) :67-75

[2]

MECHANISM OF FRACTURE IN GLASSY MATERIALS CAPABLE OF SOME INELASTIC DEFORMATION [J].

ARGON, AS ;

SALAMA, M .

MATERIALS SCIENCE AND ENGINEERING, 1976, 23 (2-3) :219-230

[3]

PLASTIC-DEFORMATION IN METALLIC GLASSES [J].

ARGON, AS .

ACTA METALLURGICA, 1979, 27 (01) :47-58

[4]

Metallic glasses as structural materials [J].

Ashby, MF ;

Greer, AL .

SCRIPTA MATERIALIA, 2006, 54 (03) :321-326

[5]

Bigerelle M, 2004, ENG FRACT MECH, V71, P1081, DOI 10.1016/S0013-7944(03)0136-X

[6]

Comment on "Interaction of shear waves and propagating cracks" - Reply [J].

Bonamy, D ;

Ravi-Chandar, K .

PHYSICAL REVIEW LETTERS, 2004, 93 (09)

[7]

Fracture through cavitation in a metallic glass [J].

Bouchaud, E. ;

Boivin, D. ;

Pouchou, J. -L. ;

Bonamy, D. ;

Poon, B. ;

Ravichandran, G. .

EPL, 2008, 83 (06)

[8]

Demetriou MD, 2011, NAT MATER, V10, P123, DOI [10.1038/nmat2930, 10.1038/NMAT2930]

[9]

INSTABILITY IN DYNAMIC FRACTURE [J].

FINEBERG, J ;

GROSS, SP ;

MARDER, M ;

SWINNEY, HL .

PHYSICAL REVIEW LETTERS, 1991, 67 (04) :457-460

[10]

Stress-Temperature Scaling for Steady-State Flow in Metallic Glasses [J].

Guan, Pengfei ;

Chen, Mingwei ;

Egami, Takeshi .

PHYSICAL REVIEW LETTERS, 2010, 104 (20)

← 1 2 3 4 →