Deformation behavior of Al-rich metallic glasses under nanoindentation

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	Deformation behavior of Al-rich metallic glasses under nanoindentation
	Guo, Hui; Jiang, Chuanbin; Yang, Baijun; Wang, Jianqiang; Wang, JQ (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
刊名	JOURNAL MATER SCI TECHNOL
	2017-11-01
卷号	33 期号:11 页码:1272-1277
关键词	Metallic Glasses Inhomogeneous Deformation Free Volume Nanoindentation
ISSN号	1005-0302
英文摘要	To clarify the deformation behavior of Al-rich metallic glasses (MGs), two kinds of Al-rich MGs (i.e. bulk and ribbon samples) with different frozen-in excess volume have been analyzed under nanoindentation. It was found that, with the decrease of frozen-in excess volume, the serration behavior becomes inconspicuous together with the increase of hardness. Further, shear transformation zones (STZs), related to the occurrence of shear banding, have been evaluated by different methods: the cooperative shearing model (CSM), the rate-jump method (RJM) and the dynamic-mechanical response (DMR). In contrast, the STZ volumes, calculated by the RJM, increase from 2.77 nm(3) in the bulk to 3.59 nm(3) in the ribbon, which are in good agreement with 2.60 nm(3) obtained from the icosahedral supercluster medium-range order structure model in Al-rich MGs. This result reflects that an intrinsic correlation exists between the formation of STZs and the medium-range orders (MROs). Moreover, the variation trend of the STZ volume was analyzed in terms of the frozen-in excess volume content. (C) 2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.; To clarify the deformation behavior of Al-rich metallic glasses (MGs), two kinds of Al-rich MGs (i.e. bulk and ribbon samples) with different frozen-in excess volume have been analyzed under nanoindentation. It was found that, with the decrease of frozen-in excess volume, the serration behavior becomes inconspicuous together with the increase of hardness. Further, shear transformation zones (STZs), related to the occurrence of shear banding, have been evaluated by different methods: the cooperative shearing model (CSM), the rate-jump method (RJM) and the dynamic-mechanical response (DMR). In contrast, the STZ volumes, calculated by the RJM, increase from 2.77 nm(3) in the bulk to 3.59 nm(3) in the ribbon, which are in good agreement with 2.60 nm(3) obtained from the icosahedral supercluster medium-range order structure model in Al-rich MGs. This result reflects that an intrinsic correlation exists between the formation of STZs and the medium-range orders (MROs). Moreover, the variation trend of the STZ volume was analyzed in terms of the frozen-in excess volume content. (C) 2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
学科主题	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
语种	英语
资助机构	National Natural Science Foundation of China [51131006, 51471166]; National Key Research and Development Program of China [2016YFB1100204]
公开日期	2018-01-10
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/78996]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wang, JQ (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式 GB/T 7714	Guo, Hui,Jiang, Chuanbin,Yang, Baijun,et al. Deformation behavior of Al-rich metallic glasses under nanoindentation[J]. JOURNAL MATER SCI TECHNOL,2017,33(11):1272-1277.
APA	Guo, Hui,Jiang, Chuanbin,Yang, Baijun,Wang, Jianqiang,&Wang, JQ .(2017).Deformation behavior of Al-rich metallic glasses under nanoindentation.JOURNAL MATER SCI TECHNOL,33(11),1272-1277.
MLA	Guo, Hui,et al."Deformation behavior of Al-rich metallic glasses under nanoindentation".JOURNAL MATER SCI TECHNOL 33.11(2017):1272-1277.