Two-dimensional mapping of micro-hardness increase on surface treated steel determined by photothermal deflection microscopy

An optical noncontact technique is presented that provides a two-dimensional map of the hardness of treated steel at the micrometer level. The photodeflection technique for determining the thermal diffusivity is shown to be a useful and rapid way to determine the hardness increase profile in two dim...

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Autores principales:	Archiopoli, U.C., Mingolo, N., Martínez, O.E.
Formato:	JOUR
Materias:	Hardness Surface characterization Thermal diffusivity After-treatment Anomalous regions Diffusivities Micrometer levels Non-contact techniques Phase delay Photodeflection technique Photothermal deflections Pump beams Strong correlation Two dimensional mapping Two-dimension Two-dimensional map Scanning electron microscopy Surface properties Thermal diffusion Two dimensional
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_02578972_v205_n8-9_p3087_Archiopoli
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_02578972_v205_n8-9_p3087_Archiopoli
record_format	dspace
spelling	todo:paper_02578972_v205_n8-9_p3087_Archiopoli2023-10-03T15:11:40Z Two-dimensional mapping of micro-hardness increase on surface treated steel determined by photothermal deflection microscopy Archiopoli, U.C. Mingolo, N. Martínez, O.E. Hardness Surface characterization Thermal diffusivity After-treatment Anomalous regions Diffusivities Micrometer levels Non-contact techniques Phase delay Photodeflection technique Photothermal deflections Pump beams Strong correlation Surface characterization Two dimensional mapping Two-dimension Two-dimensional map Hardness Scanning electron microscopy Surface properties Thermal diffusion Thermal diffusivity Two dimensional An optical noncontact technique is presented that provides a two-dimensional map of the hardness of treated steel at the micrometer level. The photodeflection technique for determining the thermal diffusivity is shown to be a useful and rapid way to determine the hardness increase profile in two dimensions with only minor preparation of the sample (flat polish). This is possible due to the strong correlation found for this type of material between the inverse of the diffusivity and the hardness increment after treatment. The diffusivity retrieval is performed by a single measurement of the phase delay between the pump beam and the photodeflection signal thus allowing a rapid scanning of the surface. The surface scans of the hardness performed with this technique showed that anomalous regions can be identified that direct optical or scanning electron microscopy observation do not reveal. © 2010 Elsevier B.V. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_02578972_v205_n8-9_p3087_Archiopoli
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Hardness Surface characterization Thermal diffusivity After-treatment Anomalous regions Diffusivities Micrometer levels Non-contact techniques Phase delay Photodeflection technique Photothermal deflections Pump beams Strong correlation Surface characterization Two dimensional mapping Two-dimension Two-dimensional map Hardness Scanning electron microscopy Surface properties Thermal diffusion Thermal diffusivity Two dimensional
spellingShingle	Hardness Surface characterization Thermal diffusivity After-treatment Anomalous regions Diffusivities Micrometer levels Non-contact techniques Phase delay Photodeflection technique Photothermal deflections Pump beams Strong correlation Surface characterization Two dimensional mapping Two-dimension Two-dimensional map Hardness Scanning electron microscopy Surface properties Thermal diffusion Thermal diffusivity Two dimensional Archiopoli, U.C. Mingolo, N. Martínez, O.E. Two-dimensional mapping of micro-hardness increase on surface treated steel determined by photothermal deflection microscopy
topic_facet	Hardness Surface characterization Thermal diffusivity After-treatment Anomalous regions Diffusivities Micrometer levels Non-contact techniques Phase delay Photodeflection technique Photothermal deflections Pump beams Strong correlation Surface characterization Two dimensional mapping Two-dimension Two-dimensional map Hardness Scanning electron microscopy Surface properties Thermal diffusion Thermal diffusivity Two dimensional
description	An optical noncontact technique is presented that provides a two-dimensional map of the hardness of treated steel at the micrometer level. The photodeflection technique for determining the thermal diffusivity is shown to be a useful and rapid way to determine the hardness increase profile in two dimensions with only minor preparation of the sample (flat polish). This is possible due to the strong correlation found for this type of material between the inverse of the diffusivity and the hardness increment after treatment. The diffusivity retrieval is performed by a single measurement of the phase delay between the pump beam and the photodeflection signal thus allowing a rapid scanning of the surface. The surface scans of the hardness performed with this technique showed that anomalous regions can be identified that direct optical or scanning electron microscopy observation do not reveal. © 2010 Elsevier B.V.
format	JOUR
author	Archiopoli, U.C. Mingolo, N. Martínez, O.E.
author_facet	Archiopoli, U.C. Mingolo, N. Martínez, O.E.
author_sort	Archiopoli, U.C.
title	Two-dimensional mapping of micro-hardness increase on surface treated steel determined by photothermal deflection microscopy
title_short	Two-dimensional mapping of micro-hardness increase on surface treated steel determined by photothermal deflection microscopy
title_full	Two-dimensional mapping of micro-hardness increase on surface treated steel determined by photothermal deflection microscopy
title_fullStr	Two-dimensional mapping of micro-hardness increase on surface treated steel determined by photothermal deflection microscopy
title_full_unstemmed	Two-dimensional mapping of micro-hardness increase on surface treated steel determined by photothermal deflection microscopy
title_sort	two-dimensional mapping of micro-hardness increase on surface treated steel determined by photothermal deflection microscopy
url	http://hdl.handle.net/20.500.12110/paper_02578972_v205_n8-9_p3087_Archiopoli
work_keys_str_mv	AT archiopoliuc twodimensionalmappingofmicrohardnessincreaseonsurfacetreatedsteeldeterminedbyphotothermaldeflectionmicroscopy AT mingolon twodimensionalmappingofmicrohardnessincreaseonsurfacetreatedsteeldeterminedbyphotothermaldeflectionmicroscopy AT martinezoe twodimensionalmappingofmicrohardnessincreaseonsurfacetreatedsteeldeterminedbyphotothermaldeflectionmicroscopy
_version_	1782028283198570496

Two-dimensional mapping of micro-hardness increase on surface treated steel determined by photothermal deflection microscopy

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