IMECH-IR  > 非线性力学国家重点实验室
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; Liu, L (reprint author), Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, Wuhan 430074, Peoples R China.
Source PublicationSCIENTIFIC REPORTS
2017-04-04
Volume7
ISSN2045-2322
AbstractThe 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.
DOI10.1038/s41598-017-00768-7
Indexed BySCI
Language英语
WOS IDWOS:000398162600001
WOS KeywordAMORPHOUS-ALLOYS ; ELASTOSTATIC COMPRESSION ; STRUCTURAL RELAXATION ; SUPERCOOLED LIQUIDS ; TEMPERATURE ; FLOW ; DEFORMATION ; DYNAMICS ; BEHAVIOR
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
Funding OrganizationNational Nature Science Foundation of China(51531003 ; MOST 973 Program(2015CB856801) ; 51471074)
DepartmentLNM冲击动力学与新型材料力学性能
Classification一类
Ranking1
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/60560
Collection非线性力学国家重点实验室
Corresponding AuthorLiu, L (reprint author), Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, Wuhan 430074, Peoples R China.
Recommended Citation
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).
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