Signature of local stress states in the deformation behavior of metallic glasses

被引：59

作者：

Bian, Xilei ^{[1
,2
]}

Sopu, Daniel ^{[2
,3
]}

Wang, Gang ^{[1
]}

Sun, Baoan ^{[4
]}

Bednarcik, Jozef ^{[5
]}

Gammer, Christoph ^{[2
]}

Zhai, Qijie ^{[1
]}

Eckert, Juergen ^{[2
,6
]}

机构：

[1] Shanghai Univ, Inst Mat, Lab Microstruct, Shanghai 200444, Peoples R China

[2] Austrian Acad Sci, Erich Schmid Inst Mat Sci, Jahnstr 12, A-8700 Leoben, Austria

[3] Tech Univ Darmstadt, Inst Mat Wissensch, Fachgebiet Mat Modellierung, D-64287 Darmstadt, Germany

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

[5] DESY Photon Sci, Notkestr 85, D-22607 Hamburg, Germany

[6] Univ Leoben, Dept Mat Sci, Chair Mat Phys, Jahnstr 12, A-8700 Leoben, Austria

来源：

NPG ASIA MATERIALS | 2020年 / 12卷 / 01期

基金：

欧洲研究理事会;

关键词：

SHEAR-BAND; STRAIN; TRANSFORMATION; REJUVENATION; COMPOSITES; PLASTICITY; ORIGIN; REAL; FLOW;

D O I：

10.1038/s41427-020-00241-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The design of ductile heterogeneous metallic glasses (MGs) with enhanced deformability by purposely controlling the shear-band dynamics via modulation of the atomic-scale structures and local stress states remains a significant challenge. Here, we correlate the changes in the local atomic structure when cooling to cryogenic temperature with the observed improved shear stability. The enhanced atomic-level structural and elastic heterogeneities related to the nonaffine thermal contraction of the short-range order (SRO) and medium-range order (MRO) change the characteristics of the activation process of the shear transformation zones (STZs). The experimental observations corroborated by Eshelby inclusion analysis and molecular dynamics simulations disclose the correlation between the structural fluctuations and the change in the stress field around the STZ. The variations in the inclination axes of the STZs alter their percolation mechanism, affect the shear-band dynamics and kinetics, and consequently delay shear failure. These results expand the understanding of the correlation between the atomic-level structure and elementary plastic events in monolithic MGs and thereby pave the way for the design of new ductile metallic alloys.

引用

页数：10

共 53 条

[1] PLASTIC-DEFORMATION IN METALLIC GLASSES [J].

ARGON, AS .

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

[2] Controlling the distribution of structural heterogeneities in severely deformed metallic glass [J].

Bian, X. L. ;

Zhao, D. ;

Kim, J. T. ;

Sopu, D. ;

Wang, G. ;

Pippan, R. ;

Eckert, J. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2019, 752 :36-42

[3] Atomic origin for rejuvenation of a Zr-based metallic glass at cryogenic temperature [J].

Bian, X. L. ;

Wang, G. ;

Yi, J. ;

Jia, Y. D. ;

Bednarcik, J. ;

Zhai, Q. J. ;

Kaban, I. ;

Sarac, B. ;

Muehlbacher, M. ;

Spieckermann, F. ;

Keckes, J. ;

Eckert, J. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2017, 718 :254-259

[4] Manipulation of free volumes in a metallic glass through Xe-ion irradiation [J].

Bian, X. L. ;

Wang, G. ;

Chen, H. C. ;

Yan, L. ;

Wang, J. G. ;

Wang, Q. ;

Hu, P. F. ;

Ren, J. L. ;

Chan, K. C. ;

Zheng, N. ;

Teresiak, A. ;

Gao, Y. L. ;

Zhai, Q. J. ;

Eckert, J. ;

Beadsworth, J. ;

Dahmen, K. A. ;

Liaw, P. K. .

ACTA MATERIALIA, 2016, 106 :66-77

[5] Cryogenic-temperature-induced structural transformation of a metallic glass [J].

Bian, Xilei ;

Wang, Gang ;

Wang, Qing ;

Sun, Baoan ;

Hussain, Ishtiaq ;

Zhai, Qijie ;

Mattern, Norbert ;

Bednarcik, Jozef ;

Eckert, Juergen .

MATERIALS RESEARCH LETTERS, 2017, 5 (04) :284-291

[6] A STOCHASTIC-MODEL FOR CONTINUUM ELASTOPLASTIC BEHAVIOR .1. NUMERICAL APPROACH AND STRAIN LOCALIZATION [J].

BULATOV, VV ;

ARGON, AS .

MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING, 1994, 2 (02) :167-184

[7] A brief overview of bulk metallic glasses [J].

Chen, Mingwei .

NPG ASIA MATERIALS, 2011, 3 :82-90

[8] Effective temperature dynamics of shear bands in metallic glasses [J].

Daub, Eric G. ;

Klaumuenzer, David ;

Loeffler, Joerg F. .

PHYSICAL REVIEW E, 2014, 90 (06)

[9] Computational modeling sheds light on structural evolution in metallic glasses and supercooled liquids [J].

Ding, Jun ;

Ma, En .

NPJ COMPUTATIONAL MATERIALS, 2017, 3

[10] Soft spots and their structural signature in a metallic glass [J].

Ding, Jun ;

Patinet, Sylvain ;

Falk, Michael L. ;

Cheng, Yongqiang ;

Ma, Evan .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2014, 111 (39) :14052-14056

← 1 2 3 4 5 6 →