Design, synthesis, and characterization of bulk metallic glass composite with enhanced plasticity |
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| Authors: | G. Y. Sun G. Chen G. L. Chen |
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| Affiliation: | (1) School of Mechanical Engineering, North China University of Water Conservancy and Electric Power, Zhengzhou, 450011, China;(2) Joint Laboratory of Nanostructured Materials and Technology, Nanjing University of Science and Technology, Nanjing, 210094, China;(3) State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, China |
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| Abstract: | A Zr-based bulk metallic glass (BMG) in situ composite with a designed composition of Zr60Ti14.67Nb5.33Cu5.56Ni4.44Be10 was prepared based on both modifying alloy composition and controlling solidification process. The composite contains high volume fraction of coarsen bcc β-Zr(Ti, Nb) solid solution. The β phase particles are short rod-like, worm-like, and nearly spherical in morphology rather than typical dendrite structure, their volume fraction and average diameter were estimated to be about 55% and 20 μm, respectively. The composite displays a large fracture strain up to 22.3% under uniaxial compression at room temperature. The coarse β phase and its high volume fraction were thought to be responsible for the excellent plastic deformability of the present composite. |
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