Mechanical Relaxation-to-Rejuvenation Transition in a Zr-based Bulk Metallic Glass

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	Mechanical Relaxation-to-Rejuvenation Transition in a Zr-based Bulk Metallic Glass
	Zhang M(张猛); Wang YM; Li FX; Jiang SQ; Li MZ; Liu L
刊名	SCIENTIFIC REPORTS
	2017-04-04
卷号	7
ISSN号	2045-2322
中文摘要	The relaxation of amorphous materials i.e. aging would largely endanger their performances in service. Here we report a mechanical relaxation-to-rejuvenation transition of a Zr35Ti30Be27.Cu-5(7.5) bulk metallic glass (BMG) in elastostatic compression at ambient temperature thus provide an accessible way to tailor the mechanical properties of amorphous materials. To unravel the structural evolution underlying the observed transition atomistic simulations parallel with the experimental tests on a typical model glass system Zr60Cu40 were performed which successfully reproduced and thus upheld the experimentally observed mechanical relaxation-to-rejuvenation transition. The variations of coordination number and atomic volume during the transition are evaluated to indicate a de-mixing tendency of the constituent atoms in the rejuvenation stage. This de-mixing tendency largely explains the difference between mechanical rejuvenation and thermal rejuvenation and reveals a competitive relationship between activation enthalpy and activation entropy in the stress-driven temperatureassisted atomic dynamics of BMG such as diffusion and plastic deformation etc.
类目[WOS]	Multidisciplinary Sciences
研究领域[WOS]	Science & Technology - Other Topics
关键词[WOS]	AMORPHOUS-ALLOYS ; ELASTOSTATIC COMPRESSION ; STRUCTURAL RELAXATION ; SUPERCOOLED LIQUIDS ; TEMPERATURE ; FLOW ; DEFORMATION ; DYNAMICS ; BEHAVIOR
收录类别	SCI
语种	英语
WOS记录号	WOS:000398162600001
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/60560]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Zhang M,Wang YM,Li FX,et al. Mechanical Relaxation-to-Rejuvenation Transition in a Zr-based Bulk Metallic Glass[J]. SCIENTIFIC REPORTS,2017,7.
APA	张猛,Wang YM,Li FX,Jiang SQ,Li MZ,&Liu L.(2017).Mechanical Relaxation-to-Rejuvenation Transition in a Zr-based Bulk Metallic Glass.SCIENTIFIC REPORTS,7.
MLA	张猛,et al."Mechanical Relaxation-to-Rejuvenation Transition in a Zr-based Bulk Metallic Glass".SCIENTIFIC REPORTS 7(2017).