MRT letter: Extended depth from focus reconstruction method for stretch zone measurement in 15-5PH steel

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dc.contributor.authorDe Oliveira Caltabiano, Pietro Carelli Reis [UNESP]
dc.contributor.authorSantos Rosa, Paulo Henrique [UNESP]
dc.contributor.authorDe Campos, Kamila Amato [UNESP]
dc.contributor.authorDe Oliveira Hein, Luis Rogerio [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:28:18Z
dc.date.available2014-05-20T13:28:18Z
dc.date.issued2012-09-01
dc.description.abstractThe stretch zone width (SZW) data for 15-5PH steel CTOD specimens fractured at -150 degrees C to + 23 degrees C temperature were measured based on focused images and 3D maps obtained by extended depth-of-field reconstruction from light microscopy (LM) image stacks. This LM-based method, with a larger lateral resolution, seems to be as effective for quantitative analysis of SZW as scanning electron microscopy (SEM) or confocal scanning laser microscopy (CSLM), permitting to clearly identify stretch zone boundaries. Despite the worst sharpness of focused images, a robust linear correlation was established to fracture toughness (KC) and SZW data for the 15-5PH steel tested specimens, measured at their center region. The method is an alternative to evaluate the boundaries of stretched zones, at a lower cost of implementation and training, since topographic data from elevation maps can be associated with reconstructed image, which summarizes the original contrast and brightness information. Finally, the extended depth-of-field method is presented here as a valuable tool for failure analysis, as a cheaper alternative to investigate rough surfaces or fracture, compared to scanning electron or confocal light microscopes. Microsc. Res. Tech. 75:11551158, 2012. (C) 2012 Wiley Periodicals, Inc.en
dc.description.affiliationUniv Estadual Paulista, UNESP, DMT, Mat Image Anal Lab,LAIMat, BR-12516410 Guaratingueta, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, UNESP, DMT, Mat Image Anal Lab,LAIMat, BR-12516410 Guaratingueta, SP, Brazil
dc.format.extent1155-1158
dc.identifierhttp://dx.doi.org/10.1002/jemt.22042
dc.identifier.citationMicroscopy Research and Technique. Hoboken: Wiley-blackwell, v. 75, n. 9, p. 1155-1158, 2012.
dc.identifier.doi10.1002/jemt.22042
dc.identifier.issn1059-910X
dc.identifier.urihttp://hdl.handle.net/11449/9418
dc.identifier.wosWOS:000307961900001
dc.language.isoeng
dc.publisherWiley-Blackwell
dc.relation.ispartofMicroscopy Research and Technique
dc.relation.ispartofjcr1.087
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectstretch zone sizeen
dc.subject3D reconstructionen
dc.subjectlight microscopyen
dc.subjectquantitative fractographyen
dc.titleMRT letter: Extended depth from focus reconstruction method for stretch zone measurement in 15-5PH steelen
dc.typeCarta
dcterms.licensehttp://olabout.wiley.com/WileyCDA/Section/id-406071.html
dcterms.rightsHolderWiley-blackwell
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Engenharia, Guaratinguetápt

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