New Class of Plastic Bulk Metallic Glass

L. Y. Chen, Z. D. Fu, G. Q. Zhang, X. P. Hao, Q. K. Jiang, X. D. Wang, Q. P. Cao, H. Franz, Y. G. Liu, H. S. Xie, S. L. Zhang, B. Y. Wang, Y. W. Zeng, and J. Z. Jiang

Phys. Rev. Lett. 100, 075501 – Published 20 February 2008

Abstract

An intrinsic plastic ${Cu}_{45} {Zr}_{46} {Al}_{7} {Ti}_{2}$ bulk metallic glass (BMG) with high strength and superior compressive plastic strain of up to 32.5% was successfully fabricated by copper mold casting. The superior compressive plastic strain was attributed to a large amount of randomly distributed free volume induced by Ti minor alloying, which results in extensive shear band formation, branching, interaction and self-healing of minor cracks. The mechanism of plasticity presented here suggests that the creation of a large amount of free volume in BMGs by minor alloying or other methods might be a promising new way to enhance the plasticity of BMGs.

Received 9 February 2007

DOI:https://doi.org/10.1103/PhysRevLett.100.075501

Authors & Affiliations

L. Y. Chen¹, Z. D. Fu², G. Q. Zhang^1,3, X. P. Hao⁴, Q. K. Jiang¹, X. D. Wang¹, Q. P. Cao¹, H. Franz⁵, Y. G. Liu⁶, H. S. Xie⁶, S. L. Zhang², B. Y. Wang⁴, Y. W. Zeng¹, and J. Z. Jiang^1,*

¹International Center for New-Structured Materials (ICNSM), Zhejiang University and Laboratory of New-Structured Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China
²Department of Physics, Peking University, Beijing 100871, People’s Republic of China
³Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Zhejiang Sci-Tech University, Hangzhou 310018, People’s Republic of China
⁴Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
⁵HASYLAB at DESY, Notkestrasse 85, D-22603 Hamburg, Germany
⁶Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, People’s Republic of China

^*To whom correspondence should be addressed. jiangjz@zju.edu.cn

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Vol. 100, Iss. 7 — 22 February 2008

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