Shear softening of Ta-containing metallic glass matrix composites upon dynamic loading

被引：11
作者：
Tang, Y. L. [1 ,2 ]
Wu, R. F. [1 ]
Jiao, Z. M. [3 ]
Shi, X. H. [1 ]
Wang, Z. H. [3 ]
Qiao, J. W. [1 ,2 ]
机构：
[1] Taiyuan Univ Technol, Minist Educ, Key Lab Interface Sci & Engn Adv Mat, Taiyuan 030024, Shanxi, Peoples R China
[2] Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China
[3] Taiyuan Univ Technol, Inst Appl Mech & Biomed Engn, Taiyuan 030024, Shanxi, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2017年 / 704卷
基金：
中国国家自然科学基金;
关键词：
Metallic glass matrix composites; Dynamic loading; Yielding strength; Localized heating; Shear bands; MECHANICAL-BEHAVIOR; AMORPHOUS-ALLOYS; DEFORMATION; PLASTICITY;
D O I：
10.1016/j.msea.2017.08.046
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The deformation behaviors of in-situ Ti5oZr18Ni5Ta15Be12 bulk metallic glass matrix composites (MGMCs) were investigated upon quasi-static and dynamic loadings. The present MGMCs exhibit good quasi-static mechanical properties, combining high fracture strength (2460 MPa) with remarkable plasticity (20%) at the strain rate of 5 x 10(-4)S(-1) When the strain rate is higher than 3080 s(-1), the strain rate effect of the yielding strength has an apparent negative strain rate sensitivity (SRS), which can be ascribed to the deteriorated ability of dendrites to impede the propagation of shear bands and the matrix-dominated fracture related to thermal softening at higher strain rates. Based on their deformation mechanisms, a constitutive relationship is obtained by cooperative shear model (CSM), which is employed to model the dynamic yielding stress behavior. The constitutive equations are established for describing the present MGMCs.
引用
收藏
页码：322 / 328
页数：7
相关论文
共 21 条
[1]   PLASTIC-DEFORMATION IN METALLIC GLASSES [J].
ARGON, AS .
ACTA METALLURGICA, 1979, 27 (01) :47-58
[2]   Strain rate dependent shear banding behavior of a Zr-based bulk metallic glass composite [J].
Chen, J. H. ;
Jiang, M. Q. ;
Chen, Y. ;
Dai, L. H. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2013, 576 :134-139
[3]   Mechanical behavior of metallic glasses: Microscopic understanding of strength and ductility [J].
Chen, Mingwei .
ANNUAL REVIEW OF MATERIALS RESEARCH, 2008, 38 :445-469
[4]   Work-hardenable ductile bulk metallic glass [J].
Das, J ;
Tang, MB ;
Kim, KB ;
Theissmann, R ;
Baier, F ;
Wang, WH ;
Eckert, J .
PHYSICAL REVIEW LETTERS, 2005, 94 (20)
[5]   Shear bands in metallic glasses [J].
Greer, A. L. ;
Cheng, Y. Q. ;
Ma, E. .
MATERIALS SCIENCE & ENGINEERING R-REPORTS, 2013, 74 (04) :71-132
[6]   Microstructure controlled shear band pattern formation and enhanced plasticity of bulk metallic glasses containing in situ formed ductile phase dendrite dispersions [J].
Hays, CC ;
Kim, CP ;
Johnson, WL .
PHYSICAL REVIEW LETTERS, 2000, 84 (13) :2901-2904
[7]   Deformation of metallic glasses: Recent developments in theory, simulations, and experiments [J].
Hufnagel, Todd C. ;
Schuh, Christopher A. ;
Falk, Michael L. .
ACTA MATERIALIA, 2016, 109 :375-393
[8]   Stabilization of metallic supercooled liquid and bulk amorphous alloys [J].
Inoue, A .
ACTA MATERIALIA, 2000, 48 (01) :279-306
[9]   Embrittlement of Zr-based bulk metallic glasses [J].
Kumar, G. ;
Rector, D. ;
Conner, R. D. ;
Schroers, J. .
ACTA MATERIALIA, 2009, 57 (12) :3572-3583
[10]   Tuning plasticity of in-situ dendrite metallic glass composites via the dendrite-volume-fraction-dependent shear banding [J].
Liu, X. F. ;
Chen, Y. ;
Jiang, M. Q. ;
Liaw, P. K. ;
Dai, L. H. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2017, 680 :121-129
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