| Rejuvenation by enthalpy relaxation in metallic glasses | |
| Meng, Y. H.1,2; Zhang, S. Y.1,2; Zhou, W. H.1,2; Yao, J. H.1; Liu, S. N.3; Lan, S.3; Li, Y.1 | |
| Corresponding Author | Yao, J. H.(jhyaobitcq@163.com) ; Lan, S.(lansi@njust.edu.cn) ; Li, Y.(liyi@imr.ac.cn) |
| 2022-12-01 | |
| Source Publication | ACTA MATERIALIA
 |
| ISSN | 1359-6454 |
| Volume | 241Pages:14 |
| Abstract | Structural relaxation can be induced by annealing and usually leads to embrittlement in metallic glasses (MGs). Here, we show that a relaxed MG obtained by annealing an as-cast MG at a temperature (anneal-ing temperature, Ta) below its fictive temperature can be suitably rejuvenated by a thermal treatment of the relaxed MG at a temperature higher than Ta. The effect is driven by enthalpy relaxation, an endother-mic reaction upon heating relaxed MG. This rejuvenation lifts the energy state of the relaxed MG towards that of the as-cast MG. Importantly, we found that the plasticity and fracture toughness of the optimally rejuvenated samples exceed those in the as-cast sample, reversing the relaxation-induced embrittlement in the relaxed sample. An analysis of the structural changes shows that the packing density, rather than the ordering of the atomic structure, is responsible for the effects of rejuvenation. The observed rejuve-nation may originate from the recovery of loosely packed regions in the MG atomic structure that were densified during annealing. Our findings are significant for tailoring the mechanical properties of MGs.(c) 2022 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| Keyword | Metallic glass Enthalpy relaxation Rejuvenation Reductilization Synchrotron X-ray diffraction |
| Funding Organization | Shenyang National Laboratory for Materials Science ; National Natural Science Foundation of China ; Natural Science Foundation of Jiangsu Province ; DOE Office of Science |
| DOI | 10.1016/j.actamat.2022.118376 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Shenyang National Laboratory for Materials Science ; National Natural Science Foundation of China[51871120] ; National Natural Science Foundation of China[52231006] ; Natural Science Foundation of Jiangsu Province[BK20200019] ; DOE Office of Science[DE-AC02-06CH11357] |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000867453200001 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/176298 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Yao, J. H.; Lan, S.; Li, Y. |
| Affiliation | 1.Inst Met Sci & Technol, Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 3.Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, Nanjing 210094, Peoples R China |
| Recommended Citation GB/T 7714 | Meng, Y. H.,Zhang, S. Y.,Zhou, W. H.,et al. Rejuvenation by enthalpy relaxation in metallic glasses[J]. ACTA MATERIALIA,2022,241:14. |
| APA | Meng, Y. H..,Zhang, S. Y..,Zhou, W. H..,Yao, J. H..,Liu, S. N..,...&Li, Y..(2022).Rejuvenation by enthalpy relaxation in metallic glasses.ACTA MATERIALIA,241,14. |
| MLA | Meng, Y. H.,et al."Rejuvenation by enthalpy relaxation in metallic glasses".ACTA MATERIALIA 241(2022):14. |
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