Ductile to brittle transition of fracture of a Zr-based bulk metallic glass: Strain rate effect

被引：28
作者：
Li, M. C. [1 ]
Jiang, M. Q. [2 ]
Li, G. [1 ]
He, L. [1 ]
Sun, J. [1 ]
Jiang, F. [1 ]
机构：
[1] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
[2] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
来源：
INTERMETALLICS | 2016年 / 77卷
基金：
中国国家自然科学基金;
关键词：
Metallic glasses; Fracture; Strain rate; Ductile-to-brittle transition; COMPRESSIVE-DEFORMATION-BEHAVIOR; TEMPERATURE PLASTICITY; STRUCTURAL RELAXATION; SHEAR BANDS; TOUGHNESS; FAILURE; EMBRITTLEMENT; PROPAGATION; MECHANISMS; CRITERION;
D O I：
10.1016/j.intermet.2016.07.004
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：
Quasi-static and dynamic tensile experiments were conducted on a Zr-based bulk metallic glass at room temperature. A significant ductile-to-brittle transition was identified with increasing strain rate, based on the changes in the macroscopic fracture mode from shear to normal tension and in the microscopic fracture feature from vein patterns to fine dimples and/or nanoscale periodic corrugations. According to the Mohr-Coulomb criterion, it is revealed that such a transition is due to the competition between the intrinsic critical shear and tensile strengths at different strain rates. Microscopically, the strain-rate induced transition is attributed to the change in the motion of local atomic groups from shear transformation zone to tension transformation zone, in which the characteristic volume of shear transformation zone is a key parameter. (C) 2016 Published by Elsevier Ltd.
引用
收藏
页码：34 / 40
页数：7
相关论文
共 65 条
[1]   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
[2]   PLASTIC-DEFORMATION IN METALLIC GLASSES [J].
ARGON, AS .
ACTA METALLURGICA, 1979, 27 (01) :47-58
[3]   Mechanics and physics of brittle to ductile transitions in fracture [J].
Argon, AS .
JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME, 2001, 123 (01) :1-11
[4]   Pressure effects on metallic glasses [J].
Caris, J. ;
Lewandowski, J. J. .
ACTA MATERIALIA, 2010, 58 (03) :1026-1036
[5]   The Microstructural Evolution and Mechanical Properties of Zr-Based Metallic Glass under Different Strain Rate Compressions [J].
Chen, Tao-Hsing ;
Tsai, Chih-Kai .
MATERIALS, 2015, 8 (04) :1831-1840
[6]   Failure criterion for metallic glasses [J].
Chen, Y. ;
Jiang, M. Q. ;
Wei, Y. J. ;
Dai, L. H. .
PHILOSOPHICAL MAGAZINE, 2011, 91 (36) :4536-4554
[7]  
CHRISTIANSEN A, 1976, J MATER SCI, V11, P1113, DOI 10.1007/BF02396647
[8]   Tensile fracture dynamics and intrinsic plasticity of metallic glasses [J].
Cui, J. W. ;
Calin, M. ;
Eckert, J. ;
Zhang, Z. F. .
APPLIED PHYSICS LETTERS, 2013, 102 (03)
[9]   Structural disordering in amorphous Pd40Ni40P20 induced by high temperature deformation [J].
De Hey, P ;
Sietsma, J ;
Van den Beukel, A .
ACTA MATERIALIA, 1998, 46 (16) :5873-5882
[10]  
Demetriou M.D., 2006, PHYS REV LETT, V97
1234567