Abstract In this paper, cryogenic mechanical property and deformation behavior of a Ti-based metallic glass matrix composites (MGMCs) containing the in-situ β dendrite phase were investigated by three point bending tests from 298 K to 77 K. The result demonstrated that the flexural strength increased with the decreasing applied temperature, e.g. the flexural yielding strength increased by 32.6% from 1890 MPa at 298 K to 2506 MPa at 77 K, which has been fitted as an exponential function on the basis of the modified Zerilli and Armstrong (Z–A) model. It is found that the β dendrite phase lost its activity gradually and failed to promote shear-bands multiplication with decreasing testing temperature, leading to plasticity of the MGMC decreased. The deformation mechanism was discussed according to the fracture characteristics of the composite deformed at different cryogenic temperature.

中文翻译：

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三点弯曲试验对钛基金属玻璃基复合材料的低温力学性能和变形行为

摘要 本文通过 298 K 至 77 K 的三点弯曲试验研究了含有原位 β 枝晶相的 Ti 基金属玻璃基复合材料 (MGMCs) 的低温力学性能和变形行为。弯曲强度随着施加温度的降低而增加，例如弯曲屈服强度增加了 32.6%，从 298 K 时的 1890 MPa 增加到 77 K 时的 2506 MPa，这已在修正的 Zerilli 和 Armstrong (Z -一个模型。发现随着试验温度的降低，β枝晶相逐渐失去活性，不能促进剪切带的增殖，导致MGMC的塑性降低。