文章基本信息

标题：Controlled Rejuvenation of Amorphous Metals with Thermal Processing
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作者：Masato Wakeda ; Junji Saida ; Ju Li 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：5
DOI：10.1038/srep10545
出版社：Springer Nature
摘要：Rejuvenation is the configurational excitation of amorphous materials and is one of the more promising approaches for improving the deformability of amorphous metals that usually exhibit macroscopic brittle fracture modes. Here, we propose a method to control the level of rejuvenation through systematic thermal processing and clarify the crucial feasibility conditions by means of molecular dynamics simulations of annealing and quenching. We also experimentally demonstrate rejuvenation level control in Zr₅₅Al₁₀Ni₅Cu₃₀ bulk metallic glass. Our local heat-treatment recipe (rising temperature above 1.1 T _g, followed by a temperature quench rate exceeding the previous) opens avenue to modifying the glass properties after it has been cast and processed into near component shape, where a higher local cooling rate may be afforded by for example transient laser heating, adding spatial control and great flexibility to the processing.