Environmental effect on the fatigue crack propagation of AM TiAl6V4 alloy specimens
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10316/101627 https://doi.org/10.1016/j.prostr.2019.08.075 |
Resumo: | industry, because of its high strength, low weight and excellent biocompatibility. Most of these components work under environmentally assisted cyclic loading, i.e. under corrosion-fatigue. Fatigue performance of additive manufactured alloys is significantly influenced by the porosities, residual stresses, which can be reduced by optimizing the process parameters, thermal treatments or hot isostatic pressing (HIP). Those parameters can also influence significantly to the propagation of cracks under corrosion-fatigue, but the understanding of this subject still needs significant research work. This paper presents the results of a fatigue crack propagation study in titanium TiAl6V4 specimens produced by selective laser melting (SLM), under corrosive ambient. The environment solutions studied were: artificial saliva and 3.5%wt NaCl solution. Tests were performed using standard 6 mm thick compact specimens (CT) tested at R=0.05 and with frequency 10 Hz. The main objective was to study the effect of the environment solution on da/dN-ΔK curves and on the fatigue failure mechanisms. Current work shows a very important accelerating effect on the crack nucleation and fatigue crack propagation for tests under corrosion ambient, particularly for 3.5%wt NaCl solution. Fatigue path shows an irregular path. Secondary cracking was observed in air, but not detected in corrosive ambient. |
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Environmental effect on the fatigue crack propagation of AM TiAl6V4 alloy specimensAdditive manufacturingcorrosion-fatiguecrack propagationTitanium TiAl6V4 alloyindustry, because of its high strength, low weight and excellent biocompatibility. Most of these components work under environmentally assisted cyclic loading, i.e. under corrosion-fatigue. Fatigue performance of additive manufactured alloys is significantly influenced by the porosities, residual stresses, which can be reduced by optimizing the process parameters, thermal treatments or hot isostatic pressing (HIP). Those parameters can also influence significantly to the propagation of cracks under corrosion-fatigue, but the understanding of this subject still needs significant research work. This paper presents the results of a fatigue crack propagation study in titanium TiAl6V4 specimens produced by selective laser melting (SLM), under corrosive ambient. The environment solutions studied were: artificial saliva and 3.5%wt NaCl solution. Tests were performed using standard 6 mm thick compact specimens (CT) tested at R=0.05 and with frequency 10 Hz. The main objective was to study the effect of the environment solution on da/dN-ΔK curves and on the fatigue failure mechanisms. Current work shows a very important accelerating effect on the crack nucleation and fatigue crack propagation for tests under corrosion ambient, particularly for 3.5%wt NaCl solution. Fatigue path shows an irregular path. Secondary cracking was observed in air, but not detected in corrosive ambient.2019info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/101627http://hdl.handle.net/10316/101627https://doi.org/10.1016/j.prostr.2019.08.075eng24523216Borrego, L. P.Jesus, J. deFerreira, J. A. M.Costa, J. D.Capela, C.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-09-05T20:43:28Zoai:estudogeral.uc.pt:10316/101627Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:18:46.877981Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Environmental effect on the fatigue crack propagation of AM TiAl6V4 alloy specimens |
title |
Environmental effect on the fatigue crack propagation of AM TiAl6V4 alloy specimens |
spellingShingle |
Environmental effect on the fatigue crack propagation of AM TiAl6V4 alloy specimens Borrego, L. P. Additive manufacturing corrosion-fatigue crack propagation Titanium TiAl6V4 alloy |
title_short |
Environmental effect on the fatigue crack propagation of AM TiAl6V4 alloy specimens |
title_full |
Environmental effect on the fatigue crack propagation of AM TiAl6V4 alloy specimens |
title_fullStr |
Environmental effect on the fatigue crack propagation of AM TiAl6V4 alloy specimens |
title_full_unstemmed |
Environmental effect on the fatigue crack propagation of AM TiAl6V4 alloy specimens |
title_sort |
Environmental effect on the fatigue crack propagation of AM TiAl6V4 alloy specimens |
author |
Borrego, L. P. |
author_facet |
Borrego, L. P. Jesus, J. de Ferreira, J. A. M. Costa, J. D. Capela, C. |
author_role |
author |
author2 |
Jesus, J. de Ferreira, J. A. M. Costa, J. D. Capela, C. |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Borrego, L. P. Jesus, J. de Ferreira, J. A. M. Costa, J. D. Capela, C. |
dc.subject.por.fl_str_mv |
Additive manufacturing corrosion-fatigue crack propagation Titanium TiAl6V4 alloy |
topic |
Additive manufacturing corrosion-fatigue crack propagation Titanium TiAl6V4 alloy |
description |
industry, because of its high strength, low weight and excellent biocompatibility. Most of these components work under environmentally assisted cyclic loading, i.e. under corrosion-fatigue. Fatigue performance of additive manufactured alloys is significantly influenced by the porosities, residual stresses, which can be reduced by optimizing the process parameters, thermal treatments or hot isostatic pressing (HIP). Those parameters can also influence significantly to the propagation of cracks under corrosion-fatigue, but the understanding of this subject still needs significant research work. This paper presents the results of a fatigue crack propagation study in titanium TiAl6V4 specimens produced by selective laser melting (SLM), under corrosive ambient. The environment solutions studied were: artificial saliva and 3.5%wt NaCl solution. Tests were performed using standard 6 mm thick compact specimens (CT) tested at R=0.05 and with frequency 10 Hz. The main objective was to study the effect of the environment solution on da/dN-ΔK curves and on the fatigue failure mechanisms. Current work shows a very important accelerating effect on the crack nucleation and fatigue crack propagation for tests under corrosion ambient, particularly for 3.5%wt NaCl solution. Fatigue path shows an irregular path. Secondary cracking was observed in air, but not detected in corrosive ambient. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019 |
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 |
http://hdl.handle.net/10316/101627 http://hdl.handle.net/10316/101627 https://doi.org/10.1016/j.prostr.2019.08.075 |
url |
http://hdl.handle.net/10316/101627 https://doi.org/10.1016/j.prostr.2019.08.075 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
24523216 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799134082288844800 |