| 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.
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| 发表期刊 | SCIENTIFIC REPORTS
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| 2017-04-04
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| 卷号 | 7 |
| ISSN | 2045-2322
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| 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. |
| DOI | 10.1038/s41598-017-00768-7
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| 收录类别 | SCI
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| 语种 | 英语
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| WOS记录号 | WOS:000398162600001
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| 关键词[WOS] | AMORPHOUS-ALLOYS
; ELASTOSTATIC COMPRESSION
; STRUCTURAL RELAXATION
; SUPERCOOLED LIQUIDS
; TEMPERATURE
; FLOW
; DEFORMATION
; DYNAMICS
; BEHAVIOR
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| WOS研究方向 | Science & Technology - Other Topics
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| WOS类目 | Multidisciplinary Sciences
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| 项目资助者 | National Nature Science Foundation of China(51531003
; MOST 973 Program(2015CB856801)
; 51471074)
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| 课题组名称 | LNM冲击动力学与新型材料力学性能
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| 论文分区 | 一类
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| 力学所作者排名 | 1
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/60560
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| 专题 | 非线性力学国家重点实验室
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| 通讯作者 | Liu, L (reprint author), Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, Wuhan 430074, Peoples R China. |
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.
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| 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.
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| 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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