Rejuvenation by enthalpy relaxation in metallic glasses

doi:10.1016/j.actamat.2022.118376

IMR OpenIR

	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
通讯作者	Yao, J. H.(jhyaobitcq@163.com) ; Lan, S.(lansi@njust.edu.cn) ; Li, Y.(liyi@imr.ac.cn)
	2022-12-01
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	241 页码:14
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.
关键词	Metallic glass Enthalpy relaxation Rejuvenation Reductilization Synchrotron X-ray diffraction
资助者	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
收录类别	SCI
语种	英语
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
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000867453200001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：21[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/176298
专题	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.