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

Abstract 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 Zr35Ti30Be27.5Cu7.5 bulk metallic glass (BMG) in elastostatic compression at ambient temperature, thus provide an...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	M. Zhang, Y. M. Wang, F. X. Li, S. Q. Jiang, M. Z. Li, L. Liu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6a201c9f56344bf69bf6d7279b585aaf
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:6a201c9f56344bf69bf6d7279b585aaf
record_format	dspace
spelling	oai:doaj.org-article:6a201c9f56344bf69bf6d7279b585aaf2021-12-02T16:07:58ZMechanical Relaxation-to-Rejuvenation Transition in a Zr-based Bulk Metallic Glass10.1038/s41598-017-00768-72045-2322https://doaj.org/article/6a201c9f56344bf69bf6d7279b585aaf2017-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-00768-7https://doaj.org/toc/2045-2322Abstract 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 Zr35Ti30Be27.5Cu7.5 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 temperature-assisted atomic dynamics of BMG, such as diffusion and plastic deformation etc.M. ZhangY. M. WangF. X. LiS. Q. JiangM. Z. LiL. LiuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-12 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q M. Zhang Y. M. Wang F. X. Li S. Q. Jiang M. Z. Li L. Liu Mechanical Relaxation-to-Rejuvenation Transition in a Zr-based Bulk Metallic Glass
description	Abstract 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 Zr35Ti30Be27.5Cu7.5 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 temperature-assisted atomic dynamics of BMG, such as diffusion and plastic deformation etc.
format	article
author	M. Zhang Y. M. Wang F. X. Li S. Q. Jiang M. Z. Li L. Liu
author_facet	M. Zhang Y. M. Wang F. X. Li S. Q. Jiang M. Z. Li L. Liu
author_sort	M. Zhang
title	Mechanical Relaxation-to-Rejuvenation Transition in a Zr-based Bulk Metallic Glass
title_short	Mechanical Relaxation-to-Rejuvenation Transition in a Zr-based Bulk Metallic Glass
title_full	Mechanical Relaxation-to-Rejuvenation Transition in a Zr-based Bulk Metallic Glass
title_fullStr	Mechanical Relaxation-to-Rejuvenation Transition in a Zr-based Bulk Metallic Glass
title_full_unstemmed	Mechanical Relaxation-to-Rejuvenation Transition in a Zr-based Bulk Metallic Glass
title_sort	mechanical relaxation-to-rejuvenation transition in a zr-based bulk metallic glass
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/6a201c9f56344bf69bf6d7279b585aaf
work_keys_str_mv	AT mzhang mechanicalrelaxationtorejuvenationtransitioninazrbasedbulkmetallicglass AT ymwang mechanicalrelaxationtorejuvenationtransitioninazrbasedbulkmetallicglass AT fxli mechanicalrelaxationtorejuvenationtransitioninazrbasedbulkmetallicglass AT sqjiang mechanicalrelaxationtorejuvenationtransitioninazrbasedbulkmetallicglass AT mzli mechanicalrelaxationtorejuvenationtransitioninazrbasedbulkmetallicglass AT lliu mechanicalrelaxationtorejuvenationtransitioninazrbasedbulkmetallicglass
_version_	1718384661483225088

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

Ejemplares similares