Stress-induced structural transformation and shear banding during simulated nanoindentation of a metallic glass

被引：131
作者：
Shi, Yunfeng [1 ]
Falk, Michael L. [1 ]
机构：
[1] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA
来源：
ACTA MATERIALIA | 2007年 / 55卷 / 13期
基金：
美国国家科学基金会;
关键词：
molecular dynamics; nanoindentation; metallic glasses; shear bands; incipient plasticity;
D O I：
10.1016/j.actamat.2007.03.029
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Simulated nanoindentation tests on a three-dimensional model of a binary metallic glass-forming alloy reveal how the stress field and material structure interact to control deformation beneath the indenter. Initially, the stress field follows the Hertzian solution with fluctuations due to heterogeneities. Homogeneous or localized plastic deformation arises, depending on the processing history of the material. In the case of localized deformation, the first shear band initiates sub-surface, relaxing the local shear stress. The subsequent shear band morphology is observed to be rate-dependent. Deformation induced changes in material structure are characterized in terms of short-range ordering and free volume, with the former providing significantly greater signal-to-noise. (C) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：4317 / 4324
页数：8
相关论文
共 44 条
  • [1] PLASTIC-DEFORMATION IN METALLIC GLASSES
    ARGON, AS
    [J]. ACTA METALLURGICA, 1979, 27 (01): : 47 - 58
  • [2] Atomistic simulation study of the shear-band deformation mechanism in Mg-Cu metallic glasses
    Bailey, NP
    Schiotz, J
    Jacobsen, KW
    [J]. PHYSICAL REVIEW B, 2006, 73 (06)
  • [3] MOLECULAR TRANSPORT IN LIQUIDS AND GLASSES
    COHEN, MH
    TURNBULL, D
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1959, 31 (05) : 1164 - 1169
  • [4] Work-hardenable ductile bulk metallic glass
    Das, J
    Tang, MB
    Kim, KB
    Theissmann, R
    Baier, F
    Wang, WH
    Eckert, J
    [J]. PHYSICAL REVIEW LETTERS, 2005, 94 (20)
  • [5] Structural disordering in amorphous Pd40Ni40P20 induced by high temperature deformation
    De Hey, P
    Sietsma, J
    Van den Beukel, A
    [J]. ACTA MATERIALIA, 1998, 46 (16) : 5873 - 5882
  • [6] Dynamics of viscoplastic deformation in amorphous solids
    Falk, ML
    Langer, JS
    [J]. PHYSICAL REVIEW E, 1998, 57 (06): : 7192 - 7205
  • [7] Local heating associated with crack tip plasticity in Zr-Ti-Ni-Cu-Be bulk amorphous metals
    Flores, KM
    Dauskardt, RH
    [J]. JOURNAL OF MATERIALS RESEARCH, 1999, 14 (03) : 638 - 643
  • [8] COMPLEX ALLOY STRUCTURES REGARDED AS SPHERE PACKINGS .1. DEFINITIONS AND BASIC PRINCIPLES
    FRANK, FC
    KASPER, JS
    [J]. ACTA CRYSTALLOGRAPHICA, 1958, 11 (03): : 184 - 190
  • [9] REFRACTORY AMORPHOUS INTER-TRANSITION METAL-ALLOYS
    GIESSEN, BC
    MADHAVA, M
    POLK, DE
    VANDERSANDE, J
    [J]. MATERIALS SCIENCE AND ENGINEERING, 1976, 23 (2-3): : 145 - 150
  • [10] Nanoindentation studies of shear banding in fully amorphous and partially devitrified metallic alloys
    Greer, AL
    Castellero, A
    Madge, SV
    Walker, IT
    Wilde, JR
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2004, 375 : 1182 - 1185
12345