Quantitative fractography under light microscopy: A digital image processing approach
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | deu eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://hdl.handle.net/11449/219280 |
Resumo: | This work is an example of the improvement on quantitative fractography by means of digital image processing and light microscopy. Two techniques are presented to investigate the quantitative fracture behavior of Ti-4Al-4V heattreated alloy specimens, under Charpy impact testing. The first technique is the Minkowski method for fractal dimension measurement from surface profiles, revealing the multifractal character of Ti-4Al-4V fracture. It was not observed a clear positive correlation of fractal values against Charpy energies for Ti-4Al-4V alloy specimens, due to their ductility, microstructural heterogeneities and the dynamic loading characteristics at region near the V-notch. The second technique provides an entire elevation map of fracture surface by extracting in-focus regions for each picture from a stack of images acquired at successive focus positions, then computing the surface roughness. Extended-focus reconstruction has been used to explain the behavior along fracture surface. Since these techniques are based on light microscopy, their inherent low cost is very interesting for failure investigations. |
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Repositório Institucional da UNESP |
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Quantitative fractography under light microscopy: A digital image processing approachThis work is an example of the improvement on quantitative fractography by means of digital image processing and light microscopy. Two techniques are presented to investigate the quantitative fracture behavior of Ti-4Al-4V heattreated alloy specimens, under Charpy impact testing. The first technique is the Minkowski method for fractal dimension measurement from surface profiles, revealing the multifractal character of Ti-4Al-4V fracture. It was not observed a clear positive correlation of fractal values against Charpy energies for Ti-4Al-4V alloy specimens, due to their ductility, microstructural heterogeneities and the dynamic loading characteristics at region near the V-notch. The second technique provides an entire elevation map of fracture surface by extracting in-focus regions for each picture from a stack of images acquired at successive focus positions, then computing the surface roughness. Extended-focus reconstruction has been used to explain the behavior along fracture surface. Since these techniques are based on light microscopy, their inherent low cost is very interesting for failure investigations.Lab. de Analise de Imagens de Mat. Campus de Guaratinguetá UNESP, Av: Dr. Ariberto Pereira Cunha, 333, Pedregulho, Guaratinguetá-SPLab. de Analise de Imagens de Mat. Campus de Guaratinguetá UNESP, Av: Dr. Ariberto Pereira Cunha, 333, Pedregulho, Guaratinguetá-SPUniversidade Estadual Paulista (UNESP)Horovistiz, Ana Lúcia [UNESP]Ribeiro, Luciano M.F. [UNESP]Campos, Kamila A. [UNESP]Jesuino, Glaucio A. [UNESP]Guimarães, Valdir A. [UNESP]Hein, Luis Rogerio de O. [UNESP]2022-04-28T18:54:40Z2022-04-28T18:54:40Z2003-02-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article57-68Praktische Metallographie/Practical Metallography, v. 40, n. 2, p. 57-68, 2003.0032-678Xhttp://hdl.handle.net/11449/2192802-s2.0-0037330549Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPdeuengPraktische Metallographie/Practical Metallographyinfo:eu-repo/semantics/openAccess2022-06-06T18:43:27Zoai:repositorio.unesp.br:11449/219280Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:25:11.848900Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Quantitative fractography under light microscopy: A digital image processing approach |
title |
Quantitative fractography under light microscopy: A digital image processing approach |
spellingShingle |
Quantitative fractography under light microscopy: A digital image processing approach Horovistiz, Ana Lúcia [UNESP] |
title_short |
Quantitative fractography under light microscopy: A digital image processing approach |
title_full |
Quantitative fractography under light microscopy: A digital image processing approach |
title_fullStr |
Quantitative fractography under light microscopy: A digital image processing approach |
title_full_unstemmed |
Quantitative fractography under light microscopy: A digital image processing approach |
title_sort |
Quantitative fractography under light microscopy: A digital image processing approach |
author |
Horovistiz, Ana Lúcia [UNESP] |
author_facet |
Horovistiz, Ana Lúcia [UNESP] Ribeiro, Luciano M.F. [UNESP] Campos, Kamila A. [UNESP] Jesuino, Glaucio A. [UNESP] Guimarães, Valdir A. [UNESP] Hein, Luis Rogerio de O. [UNESP] |
author_role |
author |
author2 |
Ribeiro, Luciano M.F. [UNESP] Campos, Kamila A. [UNESP] Jesuino, Glaucio A. [UNESP] Guimarães, Valdir A. [UNESP] Hein, Luis Rogerio de O. [UNESP] |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Horovistiz, Ana Lúcia [UNESP] Ribeiro, Luciano M.F. [UNESP] Campos, Kamila A. [UNESP] Jesuino, Glaucio A. [UNESP] Guimarães, Valdir A. [UNESP] Hein, Luis Rogerio de O. [UNESP] |
description |
This work is an example of the improvement on quantitative fractography by means of digital image processing and light microscopy. Two techniques are presented to investigate the quantitative fracture behavior of Ti-4Al-4V heattreated alloy specimens, under Charpy impact testing. The first technique is the Minkowski method for fractal dimension measurement from surface profiles, revealing the multifractal character of Ti-4Al-4V fracture. It was not observed a clear positive correlation of fractal values against Charpy energies for Ti-4Al-4V alloy specimens, due to their ductility, microstructural heterogeneities and the dynamic loading characteristics at region near the V-notch. The second technique provides an entire elevation map of fracture surface by extracting in-focus regions for each picture from a stack of images acquired at successive focus positions, then computing the surface roughness. Extended-focus reconstruction has been used to explain the behavior along fracture surface. Since these techniques are based on light microscopy, their inherent low cost is very interesting for failure investigations. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003-02-01 2022-04-28T18:54:40Z 2022-04-28T18:54:40Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Praktische Metallographie/Practical Metallography, v. 40, n. 2, p. 57-68, 2003. 0032-678X http://hdl.handle.net/11449/219280 2-s2.0-0037330549 |
identifier_str_mv |
Praktische Metallographie/Practical Metallography, v. 40, n. 2, p. 57-68, 2003. 0032-678X 2-s2.0-0037330549 |
url |
http://hdl.handle.net/11449/219280 |
dc.language.iso.fl_str_mv |
deu eng |
language |
deu eng |
dc.relation.none.fl_str_mv |
Praktische Metallographie/Practical Metallography |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
57-68 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1808128647424376832 |