Impact of micro-alloying on the plasticity of Pd-based bulk metallic glasses
Impact of micro-alloying on the plasticity of Pd-based bulk metallic glasses
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DOI：
10.1016/j.scriptamat.2015.08.030
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发表时间：
2016-01-15
影响因子：
6
通讯作者：
Wilde, Gerhard
中科院分区：
文献类型：
--
作者：
Nollmann, Niklas;Binkowski, Isabelle;Wilde, Gerhard
采用Co和Fe对Pd40Ni40P20块体金属玻璃进行了微合金化处理。压缩试验表明，Co （1 at）的塑性应变为13%。%)，而铁添加量(0.6 at。%)导致在达到弹性极限后立即失效。0.4的高泊松比并不反映塑性，因为它不受少量合金化的影响。应用有效温度概念分析微量合金化的影响表明，玻璃化过程中游离体积的总量对大块金属玻璃力学性能的影响小于其局部分布。(c) 2015材料学报Elsevier Ltd.出版。版权所有。
Micro-alloying was performed using additions of Co and Fe to monolithic Pd40Ni40P20 bulk metallic glass. Compression tests showed a plastic strain of 13% for the Co addition (1 at.%), whereas the Fe addition (0.6 at.%) led to immediate failure after reaching the elastic limit. Plasticity is not reflected by the high Poisson's ratio of 0.4 since it remained unaffected by minor alloying. Applying the fictive temperature concept to analyze the impact of minor alloying suggests that the total amount of free volume frozen-in during vitrification is less important for the mechanical properties of bulk metallic glasses than its local distribution. (c) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.