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首页> 外文期刊>Journal of Materials Research >Enhanced plasticity of Zr-based bulk metallic glass matrix composite with ductile reinforcement
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Enhanced plasticity of Zr-based bulk metallic glass matrix composite with ductile reinforcement

机译：韧性增强的Zr基块状金属玻璃基复合材料的可塑性增强

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摘要

A composite material containing uniformly distributed micrometer-sized Nb particles in a Zr-based amorphous matrix was prepared by suction cast. The resulting material exhibits high fractured strength over 1550 MPa and enhanced plastic strain of about 29.7% before failure in uniaxial compression test at room temperature. Studies of the serrations on the stress-strain curves and the shear bands on the fractured samples reveal that the amplitude of the stress drop of each serration step corresponds to the extent of the propagation of a single shear band through the materials. The composite exhibits more serration steps and smaller amplitude of stress drop due to the pinning of shear band propagation by ductile Nb particles.
机译：通过吸铸制备在Zr基非晶基质中包含均匀分布的微米级Nb颗粒的复合材料。所得材料在室温下的单轴压缩试验失败之前显示出超过1550 MPa的高断裂强度和约29.7％的增强塑性应变。对应力-应变曲线上的锯齿和断裂样品上的剪切带的研究表明，每个锯齿阶跃的应力降幅度对应于单个剪切带在材料中的传播程度。由于韧性Nb粒子束缚了剪切带的传播，复合材料呈现出更多的锯齿台阶和较小的应力降幅。

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