Mg-Cu-Zn-Y-Zr bulk metallic glassy composite with high strength and plasticity |
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| Affiliation: | 1. Helmholtz-Zentrum, Geesthacht, Institute of Materials Research, Max-Planck-Str. 1, 21502 Geesthacht, Germany;2. National Institute for Interdisciplinary Science and Technology, CSIR, Pappanamcode (P.O), Thiruvananthapuram 695 019, India;1. School of Materials Science and Engineering, Hunan University, Changsha 410082, China;2. School of Information Engineering, Guangdong Medical College, Dongguan 523808, China;1. PetroVietnam University, 762 Cach Mang Thang Tam Street, Long Toan Ward, Ba Ria City, Ba Ria - Vung Tau Province, Viet Nam;2. CSIRO Manufacturing, Clayton, Victoria 3168, Australia;1. School of Materials Science and Engineering, UNSW (The University of New South Wales), NSW 2052, Australia;2. Australian Research Council Centre of Excellence for Design in Light Metals, UNSW, NSW 2052, Australia |
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| Abstract: | Mg65Cu20Zn5Y9Zr1 bulk metallic glass matrix composite with a diameter of 2 mm was produced by copper mold casting. Upon cooling the Mg65Cu20Zn5Y9Zr1 melt, Mg2Cu acicular crystalline phase precipitates uniformly with a size of about 20 μm long and 1 μm thick while the remaining melt undergoes glass transition. Room temperature compression tests revealed that the high fracture strength up to 830 MPa and the plastic strain of 2.4% before failure are obtained for the Mg-based bulk metallic glass matrix composite. The formation of the Mg2Cu phase was proposed to contribute to high strength and plastic deformation of the material. |
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