利用熔体水淬法制备铸态内生bcc β-Zr固溶体增韧的Zr56.2Ti13.8Nb5.0Cu6.9Ni5.6Be12.5大块金属玻璃基体复合材料。β相呈发达的树枝状,体积分数约为30%。室温单轴压缩时,复合材料失效前的纯塑性应变达到了10.2%,并具有2.0%的弹性应变极限和1788MPa的极限断裂强度。显微观察表明,压缩变形后的试样表面均匀分布着大量波浪形剪切带
An as-cast in situ Zr56.2Ti13.8Nb5.0Cu6.9Ni5.6Be12.5 bulk metallic glass composite with enhanced plasticity was prepared by water quenching, which contains a ductile bcc β-Zr solid solution. The β phase with a volume fraction of about 30% possesses a developed dendritic morphology. The present composite exhibits a pure plastic strain of 10.2% combined with a large elastic strain limit of 2% and a high ultimate strength of 1778MPa upon room-temperature compression. Microscopic observation shows numbers of wavelike shear bands dispersed on the surface of deformed compressive samples
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