A New Cu-Based Metallic Glass Composite with Excellent Mechanical Properties
Dong-Mei Li1 , Lan-Sheng Chen1 , Peng Yu1* , Ding Ding2 , and Lei Xia2
1 Chongqing Key Laboratory of Photo-Electric Functional Materials, College of Physics and Electronic Engineering, Chongqing Normal University, Chongqing 401331, China2 Laboratory for Microstructure & Institute of Materials, Shanghai University, Shanghai 200072, China
Abstract ：A new Cu-based bulk metallic glass composite of nominal composition (at.%) Cu$_{41}$Ni$_{27}$Ti$_{25}$Al$_{7}$ with excellent plasticity and a strong work-hardening behavior is fabricated. Strength above 1859 MPa and plasticity more than 11% are achieved under compression and tension modes. The deformation mechanism is proposed to the structural heterogeneities of the composite that promotes multiple shear bands meanwhile inhibits their free propagation, which results in the macroscopically plastic strain and work hardening. The alloy contains relatively cheap metals and has a low cost, which is beneficial to industrial applications.
收稿日期: 2020-06-01
出版日期: 2020-07-28
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2020, Vol. 37 
