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| SYNTHESIS OF PLASTIC LIGHTWEIGHT Ti-BASED METALLIC-GLASS-MATRIX COMPOSITES BY BRIDGMAN SOLIDIFICATION |
| ZHANG Jianting, QIAO Junwei, ZHANG Yong |
| State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083 |
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Cite this article:
ZHANG Jianting QIAO Junwei ZHANG Yong. SYNTHESIS OF PLASTIC LIGHTWEIGHT Ti-BASED METALLIC-GLASS-MATRIX COMPOSITES BY BRIDGMAN SOLIDIFICATION. Acta Metall Sin, 2011, 47(2): 236-240.
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Abstract A series of lightweight Ti-based ductile in-situ dendrite-reinforced metallic-glass-matrix composites were synthesized by Bridgman solidification. Compared to Cu-mould suction casting, the $\beta$-Ti dendrites were uniformly distributed within the glass matrix by this method. Through tailoring the withdrawal velocity, the volume fraction and the characteristic spanning length of dendrites could be changed, which provides a way to optimize the mechanical properties of the composites. The Ti-based composite with excellent mechanical performances (high ultimate strength of 2706 MPa and large plasticity of 18.0% with apparent work-hardening behavior) was synthesized when the withdrawal velocity was fixed at 1.4 mm/s. The relationship between the size of the dendrites and the mechanical properties was investigated, and it was found that the improved mechanical properties were obtained when the size of the dendrited approached about 40 μm.
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Received: 10 August 2010
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| Fund: Supported by National Basic Research Program of China (No.2007CB613903) |
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