Transient self-dewetting of steels after pulsed electron beam melting

Experimental evidence of transient self-dewetting of metallic surfaces is presented. Steel surfaces are melted by a pulsed electron gun, and the subsequent fast cooling against its substrate gives rise to the formation of characteristic patterns that we attribute to the dewetting of the liquid film....

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Autores principales: Mingolo, N., Roviglione, A.N., Marti´nez, O.E.
Formato: JOUR
Materias:
Cooling
Electron beam melting
Electron guns
Nucleation
Surface tension
Surfaces
Wetting
Dewetting
Steel
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_08842914_v16_n8_p2343_Mingolo
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_08842914_v16_n8_p2343_Mingolo2023-10-03T15:40:36Z Transient self-dewetting of steels after pulsed electron beam melting Mingolo, N. Roviglione, A.N. Marti´nez, O.E. Cooling Electron beam melting Electron guns Nucleation Surface tension Surfaces Wetting Dewetting Steel Experimental evidence of transient self-dewetting of metallic surfaces is presented. Steel surfaces are melted by a pulsed electron gun, and the subsequent fast cooling against its substrate gives rise to the formation of characteristic patterns that we attribute to the dewetting of the liquid film. The patterns formed are similar to those obtained by spinodal dewetting, that is, when the dewetting action develops from a nonlinear instability on the liquid surface, and not from holes nucleation. High-purity iron does not show a similar behavior, indicating that the origin of the instability is due to the influence of the sulfur in the temperature dependence of the surface tension of the melt, which gives rise to a Be’nard-Marangoni instability. © 2001 Materials Research Society. Fil:Mingolo, N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_08842914_v16_n8_p2343_Mingolo
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Cooling
Electron beam melting
Electron guns
Nucleation
Surface tension
Surfaces
Wetting
Dewetting
Steel
spellingShingle Cooling
Electron beam melting
Electron guns
Nucleation
Surface tension
Surfaces
Wetting
Dewetting
Steel
Mingolo, N.
Roviglione, A.N.
Marti´nez, O.E.
Transient self-dewetting of steels after pulsed electron beam melting
topic_facet Cooling
Electron beam melting
Electron guns
Nucleation
Surface tension
Surfaces
Wetting
Dewetting
Steel
description Experimental evidence of transient self-dewetting of metallic surfaces is presented. Steel surfaces are melted by a pulsed electron gun, and the subsequent fast cooling against its substrate gives rise to the formation of characteristic patterns that we attribute to the dewetting of the liquid film. The patterns formed are similar to those obtained by spinodal dewetting, that is, when the dewetting action develops from a nonlinear instability on the liquid surface, and not from holes nucleation. High-purity iron does not show a similar behavior, indicating that the origin of the instability is due to the influence of the sulfur in the temperature dependence of the surface tension of the melt, which gives rise to a Be’nard-Marangoni instability. © 2001 Materials Research Society.
format JOUR
author Mingolo, N.
Roviglione, A.N.
Marti´nez, O.E.
author_facet Mingolo, N.
Roviglione, A.N.
Marti´nez, O.E.
author_sort Mingolo, N.
title Transient self-dewetting of steels after pulsed electron beam melting
title_short Transient self-dewetting of steels after pulsed electron beam melting
title_full Transient self-dewetting of steels after pulsed electron beam melting
title_fullStr Transient self-dewetting of steels after pulsed electron beam melting
title_full_unstemmed Transient self-dewetting of steels after pulsed electron beam melting
title_sort transient self-dewetting of steels after pulsed electron beam melting
url http://hdl.handle.net/20.500.12110/paper_08842914_v16_n8_p2343_Mingolo
work_keys_str_mv AT mingolon transientselfdewettingofsteelsafterpulsedelectronbeammelting
AT roviglionean transientselfdewettingofsteelsafterpulsedelectronbeammelting
AT martinezoe transientselfdewettingofsteelsafterpulsedelectronbeammelting
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