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首页> 外文期刊>Materials Science and Engineering >Microstructure and mechanical properties of a Cu-Zr based bulk metallic glass containing atomic scale chemical heterogeneities
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Microstructure and mechanical properties of a Cu-Zr based bulk metallic glass containing atomic scale chemical heterogeneities

机译：包含原子级化学异质性的Cu-Zr基大块金属玻璃的微观结构和力学性能

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摘要

In this research, Tin was alloyed to the Cu47Zr47Al6bulk metallic glass to induce chemical heterogeneities formation and study its effect on the mechanical and thermal properties. The large difference in enthalpy of mixing of Sn-Zr (−43 kJ/mol) and Sn-Cu (+7 kJ/mol) causes chemical heterogeneities. Microstructural examination showed composition fluctuations including Cu-rich and Zr-rich zones in (Cu47Zr47Al6)99Sn1alloy, improves ductility and fracture strength by 72.15% and 26.37%, respectively. Correlation between microstructure and mechanical properties was investigated through work hardening behavior, serration density and fractography of compression samples. Chemical heterogeneities lead to increase in shear bands, consequently enhance ductility and work hardening rate.
机译：在这项研究中，锡与Cu47Zr47Al6bulk金属玻璃形成合金以诱导化学异质形成，并研究其对机械和热性能的影响。 Sn-Zr（-43 kJ / mol）和Sn-Cu（+7 kJ / mol）混合焓的较大差异会导致化学异质性。显微组织检查显示，（Cu47Zr47Al6）99Sn1合金中包括富Cu和富Zr区域的成分波动，分别将延展性和断裂强度提高了72.15％和26.37％。通过加工硬化行为，锯齿密度和压缩样品的分形图研究了微观结构与力学性能之间的关系。化学异质性导致剪切带增加，因此提高了延展性和加工硬化率。

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