Conspicuous rejuvenation of plasma-assisted hydrogenated Zr-based bulk metallic glasses via deep cryogenic cycling treatment

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: A Pub Date : 2024-11-14 DOI:10.1016/j.msea.2024.147559

Guishen Zhou , Yuexin Chu , Fuyu Dong , Yue Zhang , Kun Liu , Binbin Wang , Liangshun Luo , Yanqing Su , Xiaoguang Yuan , Weidong Li , Peter K. Liaw , Jun Cheng

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Abstract

To obtain a greater degree of a deep cryogenic cycle treatment (DCT)-induced rejuvenation, Zr-based bulk metallic glass samples were prepared under a mixed argon/hydrogen atmosphere prior to the deep cryogenic cycling treatment. The degree of rejuvenation is quantified by the increase of relaxation enthalpy ΔH_rel measured by differential scanning calorimetry (DSC). The purpose of this pretreatment was to change the chemical heterogeneity through the in situ absorption of hydrogen during melting and solidification. It was found that the hydrogenated specimens were more sensitive to DCT and exceeded the rejuvenation upper limit of uncharged specimens. The results were compared with previous reports, which further highlighted the distinctive advantage of the H-charged specimens for DCT. Furthermore, the plasticity of the hydrogenated metallic glass was enhanced significantly after DCT, as supported by hardness, compression ductility, and nanoindentation creep data. It is crucial to understand that DCT-induced rejuvenation is related to the content of hydrogen and may provide a new avenue to improve the mechanical properties or functional characteristics of BMG.

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通过深低温循环处理实现等离子体辅助氢化锆基块状金属玻璃的明显年轻化

为了获得更大程度的深低温循环处理（DCT）诱导的年轻化，在进行深低温循环处理之前，在氩气/氢气混合气氛下制备了锆基块状金属玻璃样品。通过差示扫描量热仪（DSC）测量弛豫焓 ΔHrel 的增加来量化年轻化程度。这种预处理的目的是通过在熔化和凝固过程中原位吸收氢来改变化学异质性。研究发现，氢化试样对 DCT 更为敏感，并且超过了未带电试样的再生上限。研究结果与之前的报告进行了比较，进一步凸显了充氢试样在 DCT 方面的独特优势。此外，氢化金属玻璃的塑性在 DCT 之后显著增强，硬度、压缩延展性和纳米压痕蠕变数据都证明了这一点。关键是要了解 DCT 诱导的年轻化与氢含量有关，这可能为改善 BMG 的机械性能或功能特性提供了一条新途径。

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来源期刊

Materials Science and Engineering: A 工程技术-材料科学：综合

CiteScore

11.50

自引率

15.60%

发文量

1811

审稿时长

31 days

期刊介绍： Materials Science and Engineering A provides an international medium for the publication of theoretical and experimental studies related to the load-bearing capacity of materials as influenced by their basic properties, processing history, microstructure and operating environment. Appropriate submissions to Materials Science and Engineering A should include scientific and/or engineering factors which affect the microstructure - strength relationships of materials and report the changes to mechanical behavior.