【摘 要】
：
Zr_(58.5)Ti_(14.3)Nb_(5.2)Cu_(6.1)Ni_(4.9)Be_(11.0) bulk metallic glass matrix composites, containing β-Zr dendrites, were fabricated by Bridgman solidificatio
【机 构】
：
State Key Laboratory for Advanced Metals and Materials
【基金项目】
：
the New Century Excellent Talents in Universities;the Natronal Basic Research Priorities Program of
论文部分内容阅读
Zr_(58.5)Ti_(14.3)Nb_(5.2)Cu_(6.1)Ni_(4.9)Be_(11.0) bulk metallic glass matrix composites, containing β-Zr dendrites, were fabricated by Bridgman solidification at the withdrawal velocity of 1.0 mm/s through a temperature gradient of -45 K/mm. Subjected to the increasing compressivestrain rates, the monotonic increasing and decreasing were obtained for the maximum strength and the fracture strain, respectively. The results show that high strain rate may induce the insufficient time for the interaction between shear bands and the cUstalline phase, and earlyfracture occurs as a result. The fractographs are consistent with the mechanical properties, and the failure mode of the present Zr-based composites is in agreement with the frame of the ellipse criterion.
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