Rejuvenation by enthalpy relaxation in metallic glasses
文献类型：期刊论文
| 作者 | 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 |
| 刊名 | ACTA MATERIALIA
 |
| 出版日期 | 2022-12-01 |
| 卷号 | 241页码:14 |
| ISSN号 | 1359-6454 |
| 关键词 | Metallic glass Enthalpy relaxation Rejuvenation Reductilization Synchrotron X-ray diffraction |
| DOI | 10.1016/j.actamat.2022.118376 |
| 通讯作者 | Yao, J. H.(jhyaobitcq@163.com) ; Lan, S.(lansi@njust.edu.cn) ; Li, Y.(liyi@imr.ac.cn) |
| 英文摘要 | 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. |
| 资助项目 | 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研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:000867453200001 |
| 资助机构 | Shenyang National Laboratory for Materials Science ; National Natural Science Foundation of China ; Natural Science Foundation of Jiangsu Province ; DOE Office of Science |
| 源URL | [http://ir.imr.ac.cn/handle/321006/176297]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Yao, J. H.; Lan, S.; Li, Y. |
| 作者单位 | 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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：金属研究所
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