Abstract Tensile work-hardening ability (~1.8%) was firstly obtained in an in-situ metallic glass matrix composite (MGMCs) at cryogenic temperature (77 K). It is interesting that stress-induced martensitic (SIM) transformation occurs at 77 K, but not at 298 K within dendrites. It is owning to the change of the competitive relationship between the dislocation slips and SIM transformation from 298 to 77 K. The formation of martensite and the special morphology formed by its segmentation effectively improve the hardening ability. The retardation of the propagating shear bands and the formation of multiple shear bands effectively decrease the softening rate.

中文翻译：

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金属玻璃基复合材料在低温下的加工硬化和均匀伸长率

摘要 拉伸加工硬化能力 (~1.8%) 首次在低温 (77 K) 下在原位金属玻璃基复合材料 (MGMCs) 中获得。有趣的是，应力诱导马氏体 (SIM) 转变发生在 77 K 处，但不在枝晶内的 298 K 处发生。这是由于位错滑移与SIM转变之间的竞争关系从298到77 K的变化。马氏体的形成及其分割形成的特殊形貌有效地提高了硬化能力。传播剪切带的延迟和多个剪切带的形成有效地降低了软化速率。