Ductile-to-brittle transition in a Ti-based bulk metallic glass

被引：54

作者：

Gu, X. J. ^{[1
]}

Poon, S. J. ^{[2
]}

Shiflet, G. J. ^{[3
]}

Lewandowski, J. J. ^{[1
]}

机构：

[1] Case Western Reserve Univ, Dept Mat Sci & Engn, Cleveland, OH 44106 USA

[2] Univ Virginia, Dept Phys, Charlottesville, VA 22904 USA

[3] Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA 22904 USA

来源：

SCRIPTA MATERIALIA | 2009年 / 60卷 / 11期

关键词：

Metallic glasses; Toughness; Brittle-to-ductile transition; FRACTURE-TOUGHNESS; COMPOSITES; STATE;

D O I：

10.1016/j.scriptamat.2009.02.037

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effects of changes in cooling rate on the density, elastic constants and fracture energy have been determined for Ti40Zr25Cu12Ni3Be20 bulk metallic glass. It is shown that changes in cooling rate directly affect the measured density and elastic constants, while the fracture energy, ranging from 148.9 to only 0.2 kJ m(-2), is also shown to correlate with these changes in cooling rate/density/elastic constants. The critical Poisson's ratio for toughness in this alloy system is 0.35, somewhat higher than that obtained in other metallic glasses, although consistent with recent theoretical predictions. Further correlations with these changes in toughness on the fracture surface appearance are provided. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：1027 / 1030

页数：4

共 24 条

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

ARGON, AS .

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

[2] Critical Poisson ratio for room-temperature embrittlement of amorphous Mg85Cu5Y10 [J].

Castellero, A. ;

Uhlenhaut, D. I. ;

Moser, B. ;

Loeffler, J. F. .

PHILOSOPHICAL MAGAZINE LETTERS, 2007, 87 (06) :383-392

[3] New class of plastic bulk metallic glass [J].

Chen, L. Y. ;

Fu, Z. D. ;

Zhang, G. Q. ;

Hao, X. P. ;

Jiang, Q. K. ;

Wang, X. D. ;

Cao, Q. P. ;

Franz, H. ;

Liu, Y. G. ;

Xie, H. S. ;

Zhang, S. L. ;

Wang, B. Y. ;

Zeng, Y. W. ;

Jiang, J. Z. .

PHYSICAL REVIEW LETTERS, 2008, 100 (07)

[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] Compositional dependence of thermal, elastic, and mechanical properties in Cu-Zr-Ag bulk metallic glasses [J].

Duan, Gang ;

De Blauwe, Katrien ;

Lind, Mary Laura ;

Schramm, Joseph P. ;

Johnson, William L. .

SCRIPTA MATERIALIA, 2008, 58 (03) :159-162

[6] Mechanical behavior of a Zr-based bulk metallic glass and its composite at cryogenic temperatures [J].

Fan, Cang ;

Gao, Y. F. ;

Li, H. Q. ;

Choo, H. ;

Liaw, P. K. ;

Inoue, A. ;

Liu, C. T. .

JOURNAL OF MATERIALS RESEARCH, 2007, 22 (02) :445-452

[7] Critical Poisson's ratio for plasticity in Fe-Mo-C-B-Ln bulk amorphous steel [J].

Gu, X. J. ;

McDermott, A. G. ;

Poon, S. Joseph ;

Shiflet, Gary J. .

APPLIED PHYSICS LETTERS, 2006, 88 (21)

[8] Networking amorphous phase reinforced titanium composites which show tensile plasticity [J].

Guo, F. Q. ;

Poon, S. J. ;

Shiflet, G. J. .

PHILOSOPHICAL MAGAZINE LETTERS, 2008, 88 (08) :615-622

[9] White organic light-emitting diodes based on tandem structures [J].

Guo, FW ;

Ma, DG .

APPLIED PHYSICS LETTERS, 2005, 87 (17) :1-3

[10] Designing metallic glass matrix composites with high toughness and tensile ductility [J].

Hofmann, Douglas C. ;

Suh, Jin-Yoo ;

Wiest, Aaron ;

Duan, Gang ;

Lind, Mary-Laura ;

Demetriou, Marios D. ;

Johnson, William L. .

NATURE, 2008, 451 (7182) :1085-U3

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