Effect of plasma nitriding on fatigue behavior of Ti-6Al-4V alloy
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , , , , , , |
Tipo de documento: | Artigo de conferência |
Título da fonte: | Repositório Institucional do IPEN |
Texto Completo: | http://repositorio.ipen.br/handle/123456789/29470 |
Resumo: | The Ti-6Al-4V alloy is widely used in the manufacture of components that should have low density, high corrosion resistance, and fatigue strength. The fatigue strength can be improved by surface modification. The aim of this study was to determine the influence of plasma nitriding on the fatigue behavior of Ti-6Al-4V alloy with a lamellar microstructure (Widmanst??tten type). Nitriding was executed at 720 ??C for 4 hours in an atmosphere with N2, Ar and H2. Samples microstructure characterization was carried out by X-ray diffraction analysis, optical microscopy and scanning electron microscopy. The average roughness of the specimens was determined, and fatigue tests were executed in a bending-rotating machine with reverse tension cycles (R= -1). X-ray diffraction analysis revealed the matrix phases ?? and ??, and the phases ??-Ti2N and ??-TiN in the nitrided alloy. A nitrogen diffusion layer was formed between the substrate and the titanium nitrides. Plasma nitriding resulted in an increase in low cycle fatigue strength, whereas at high cycles, both conditions exhibit similar behavior. The fracture surface of the fatigue tested specimens clearly revealed the lamellar microstructure. The fracture mechanism appears to be due to cracking at the interface of ?? and ?? phases of the lamellar microstructure. |
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2019-02-04T12:35:04Z2019-02-04T12:35:04ZJuly 1-5, 2018http://repositorio.ipen.br/handle/123456789/2947010.20944/preprints201812.0326.v1aguardandoThe Ti-6Al-4V alloy is widely used in the manufacture of components that should have low density, high corrosion resistance, and fatigue strength. The fatigue strength can be improved by surface modification. The aim of this study was to determine the influence of plasma nitriding on the fatigue behavior of Ti-6Al-4V alloy with a lamellar microstructure (Widmanst??tten type). Nitriding was executed at 720 ??C for 4 hours in an atmosphere with N2, Ar and H2. Samples microstructure characterization was carried out by X-ray diffraction analysis, optical microscopy and scanning electron microscopy. The average roughness of the specimens was determined, and fatigue tests were executed in a bending-rotating machine with reverse tension cycles (R= -1). X-ray diffraction analysis revealed the matrix phases ?? and ??, and the phases ??-Ti2N and ??-TiN in the nitrided alloy. A nitrogen diffusion layer was formed between the substrate and the titanium nitrides. Plasma nitriding resulted in an increase in low cycle fatigue strength, whereas at high cycles, both conditions exhibit similar behavior. The fracture surface of the fatigue tested specimens clearly revealed the lamellar microstructure. The fracture mechanism appears to be due to cracking at the interface of ?? and ?? phases of the lamellar microstructure.Submitted by Marco Antonio Oliveira da Silva (maosilva@ipen.br) on 2019-02-04T12:35:04Z No. of bitstreams: 1 25258.pdf: 2979902 bytes, checksum: 63467ec5999c58b2b799986588cb99f7 (MD5)Made available in DSpace on 2019-02-04T12:35:04Z (GMT). No. of bitstreams: 1 25258.pdf: 2979902 bytes, checksum: 63467ec5999c58b2b799986588cb99f7 (MD5)Coordena????o de Aperfei??oamento de Pessoal de N??vel Superior (CAPES)CAPES: PROEX 01-2018Effect of plasma nitriding on fatigue behavior of Ti-6Al-4V alloyinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectACE-XIAmsterdamCASTRO, MICHELE C.B. deCOUTO, ANTONIO A.ALMEIDA, GISELE F.C.MASSI, MARCOSLIMA, NELSON B. deSILVA SOBRINHO, ARGEMIRO daCASTAGNET, MARIANOXAVIER, GLEICY L.OLIVEIRA, RENE R.INTERNATIONAL CONFERENCE ON ADVANCED COMPUTATIONAL ENGINEERING AND EXPERIMENTING, 12thinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional do IPENinstname:Instituto de Pesquisas Energéticas e Nucleares (IPEN)instacron:IPEN252582018CASTRO, MICHELE C.B. deCOUTO, ANTONIO A.ALMEIDA, GISELE F.C.LIMA, NELSON B. deCASTAGNET, MARIANOXAVIER, GLEICY L.OLIVEIRA, RENE R.19-02Proceedings143623941140755061012100942CASTRO, MICHELE C.B. 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dc.title.pt_BR.fl_str_mv |
Effect of plasma nitriding on fatigue behavior of Ti-6Al-4V alloy |
title |
Effect of plasma nitriding on fatigue behavior of Ti-6Al-4V alloy |
spellingShingle |
Effect of plasma nitriding on fatigue behavior of Ti-6Al-4V alloy CASTRO, MICHELE C.B. de |
title_short |
Effect of plasma nitriding on fatigue behavior of Ti-6Al-4V alloy |
title_full |
Effect of plasma nitriding on fatigue behavior of Ti-6Al-4V alloy |
title_fullStr |
Effect of plasma nitriding on fatigue behavior of Ti-6Al-4V alloy |
title_full_unstemmed |
Effect of plasma nitriding on fatigue behavior of Ti-6Al-4V alloy |
title_sort |
Effect of plasma nitriding on fatigue behavior of Ti-6Al-4V alloy |
author |
CASTRO, MICHELE C.B. de |
author_facet |
CASTRO, MICHELE C.B. de COUTO, ANTONIO A. ALMEIDA, GISELE F.C. MASSI, MARCOS LIMA, NELSON B. de SILVA SOBRINHO, ARGEMIRO da CASTAGNET, MARIANO XAVIER, GLEICY L. OLIVEIRA, RENE R. INTERNATIONAL CONFERENCE ON ADVANCED COMPUTATIONAL ENGINEERING AND EXPERIMENTING, 12th |
author_role |
author |
author2 |
COUTO, ANTONIO A. ALMEIDA, GISELE F.C. MASSI, MARCOS LIMA, NELSON B. de SILVA SOBRINHO, ARGEMIRO da CASTAGNET, MARIANO XAVIER, GLEICY L. OLIVEIRA, RENE R. INTERNATIONAL CONFERENCE ON ADVANCED COMPUTATIONAL ENGINEERING AND EXPERIMENTING, 12th |
author2_role |
author author author author author author author author author |
dc.contributor.author.fl_str_mv |
CASTRO, MICHELE C.B. de COUTO, ANTONIO A. ALMEIDA, GISELE F.C. MASSI, MARCOS LIMA, NELSON B. de SILVA SOBRINHO, ARGEMIRO da CASTAGNET, MARIANO XAVIER, GLEICY L. OLIVEIRA, RENE R. INTERNATIONAL CONFERENCE ON ADVANCED COMPUTATIONAL ENGINEERING AND EXPERIMENTING, 12th |
description |
The Ti-6Al-4V alloy is widely used in the manufacture of components that should have low density, high corrosion resistance, and fatigue strength. The fatigue strength can be improved by surface modification. The aim of this study was to determine the influence of plasma nitriding on the fatigue behavior of Ti-6Al-4V alloy with a lamellar microstructure (Widmanst??tten type). Nitriding was executed at 720 ??C for 4 hours in an atmosphere with N2, Ar and H2. Samples microstructure characterization was carried out by X-ray diffraction analysis, optical microscopy and scanning electron microscopy. The average roughness of the specimens was determined, and fatigue tests were executed in a bending-rotating machine with reverse tension cycles (R= -1). X-ray diffraction analysis revealed the matrix phases ?? and ??, and the phases ??-Ti2N and ??-TiN in the nitrided alloy. A nitrogen diffusion layer was formed between the substrate and the titanium nitrides. Plasma nitriding resulted in an increase in low cycle fatigue strength, whereas at high cycles, both conditions exhibit similar behavior. The fracture surface of the fatigue tested specimens clearly revealed the lamellar microstructure. The fracture mechanism appears to be due to cracking at the interface of ?? and ?? phases of the lamellar microstructure. |
publishDate |
2019 |
dc.date.evento.pt_BR.fl_str_mv |
July 1-5, 2018 |
dc.date.accessioned.fl_str_mv |
2019-02-04T12:35:04Z |
dc.date.available.fl_str_mv |
2019-02-04T12:35:04Z |
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info:eu-repo/semantics/publishedVersion |
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conferenceObject |
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publishedVersion |
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http://repositorio.ipen.br/handle/123456789/29470 |
dc.identifier.doi.pt_BR.fl_str_mv |
10.20944/preprints201812.0326.v1 |
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aguardando |
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http://repositorio.ipen.br/handle/123456789/29470 |
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