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首页> 外文期刊>Materials Science and Engineering >Phases distribution dependent strength in metallic glass-aluminium composites prepared by spark plasma sintering
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Phases distribution dependent strength in metallic glass-aluminium composites prepared by spark plasma sintering

机译：火花等离子体烧结制备金属玻璃-铝复合材料的相变强度

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摘要

Composites with volume fraction from 10vol.% to 90vol.% were prepared by spark plasma sintering (SPS) of mixing of aluminium and metallic glass (Zr_(57)Cu_(20)Al_(10)Ni_8Ti_5) powders with similar particle size. These materials show gradual evolution of their mechanical behaviour. First, monotonous but non linear variation of the strength is observed. That reveals two different mechanisms describing the dependence of strength with the composition and architecture. Second, stress-strain curves successively show, from low to high Al content, absence of plasticity, plasticity with intensive decrease of strength related to local damaging, and finally plasticity with work hardening. The mechanical behaviour evolutions are geometrically and analytically modelled. This reveals change in behaviour at the expected 3-dimensional percolation thresholds for a random spatial distribution of two phases.
机译：通过铝和金属粉末（Zr_（57）Cu_（20）Al_（10）Ni_8Ti_5）粉末混合的火花等离子体烧结（SPS）制备体积分数为10vol％至90vol％的复合材料。这些材料显示出其机械性能的逐渐演变。首先，观察到强度的单调但非线性变化。这揭示了两种不同的机制来描述强度与成分和结构的依赖性。其次，应力-应变曲线从低到高依次显示出缺乏可塑性，可塑性以及与局部破坏有关的强度显着降低，最后随着加工硬化而具有可塑性。机械行为的演变是在几何和分析模型上进行的。这揭示了在两相随机空间分布的预期3维渗透阈值下的行为变化。

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