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通过制备不同尺寸的Ti45.7Zr33Ni2.9Cu5.9Be12.5非晶复合材料样品,研究了冷却速率和高径比对内生枝晶相增强钛基非晶复合材料力学性能的影响.随着制备过程中冷却速率的降低,非晶复合材料中枝晶相的尺寸逐渐增大,同时枝晶相熟化的现象也趋于明显.在力学性能方面表现为非晶复合材料的强度降低而塑性增强.与以往非晶复合材料性能对高径比比较敏感所不同的是,本工作中的Ti45.7Zr33Ni2.9Cu5.9Be12.5非晶复合材料的力学性能对高径比的变化并不敏感,原因在于晶态相的存在以及其中的形变诱发马氏体相变行为的发生对非晶复合材料内部应力分布的调节.
The effects of cooling rate and aspect ratio on the mechanical properties of Ti-based amorphous composites reinforced by endogenous dendrites were studied by preparing Ti45.7Zr33Ni2.9Cu5.9Be12.5 amorphous composites with different sizes. With the preparation process The cooling rate decreases, the size of the dendrite phase in the amorphous composite material increases gradually, and the phenomena of dendrite phase aging tend to be obvious. The mechanical properties show that the strength of the amorphous composite material decreases and the plasticity increases. The difference between the properties of amorphous composites and the diameter-diameter ratio is that the mechanical properties of Ti45.7Zr33Ni2.9Cu5.9Be12.5 amorphous composites in this work are not sensitive to the variation of height-diameter ratio due to the crystalline state The existence of phase and the occurrence of deformation-induced martensitic transformation in the amorphous matrix composites were investigated by adjusting the internal stress distribution.