Metallurgical response of an AISI 4140 steel to different plasma nitriding gas mixtures
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/100111 |
Resumo: | Plasma nitriding is a surface modification process that uses glow discharge to diffuse nitrogen atoms into the metallic matrix of different materials. Among the many possible parameters of the process, the gas mixture composition plays an important role, as it impacts directly the formed layer’s microstructure. In this work an AISI 4140 steel was plasma nitrided under five different gas compositions. The plasma nitriding samples were characterized using optical and scanning electron microscopy, microhardness test, X-ray diffraction and GDOES. The results showed that there are significant microstructural and morphological differences on the formed layers depending on the quantity of nitrogen and methane added to the plasma nitriding atmosphere. Thicknesses of 10, 5 and 2.5 μm were obtained when the nitrogen content of the gas mixtures were varied. The possibility to obtain a compound layer formed mainly by γ’-Fe4N nitrides was also shown. For all studied plasma nitriding conditions, the presence of a compound layer was recognized as being the responsible to hinder the decarburization on the steel surface. The highest value of surface hardness - 1277HV - were measured in the sample which were nitrided with 3vol.% of CH4. |
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Skonieski, Adão Felipe OliveiraSantos, Giovanni Rocha dosHirsch, ThomasRocha, Alexandre da Silva2014-08-12T02:10:37Z20131516-1439http://hdl.handle.net/10183/100111000919018Plasma nitriding is a surface modification process that uses glow discharge to diffuse nitrogen atoms into the metallic matrix of different materials. Among the many possible parameters of the process, the gas mixture composition plays an important role, as it impacts directly the formed layer’s microstructure. In this work an AISI 4140 steel was plasma nitrided under five different gas compositions. The plasma nitriding samples were characterized using optical and scanning electron microscopy, microhardness test, X-ray diffraction and GDOES. The results showed that there are significant microstructural and morphological differences on the formed layers depending on the quantity of nitrogen and methane added to the plasma nitriding atmosphere. Thicknesses of 10, 5 and 2.5 μm were obtained when the nitrogen content of the gas mixtures were varied. The possibility to obtain a compound layer formed mainly by γ’-Fe4N nitrides was also shown. For all studied plasma nitriding conditions, the presence of a compound layer was recognized as being the responsible to hinder the decarburization on the steel surface. The highest value of surface hardness - 1277HV - were measured in the sample which were nitrided with 3vol.% of CH4.application/pdfengMaterials research : ibero-american journal of materials. São Carlos, SP. Vol. 16, no. 4 (Jul./Ago. 2013), p. 884-890Nitretação a plasmaAçoPropriedades mecânicasPlasma nitridingMechanical propertiesSurface compositionMetallurgical response of an AISI 4140 steel to different plasma nitriding gas mixturesinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000919018.pdf000919018.pdfTexto completo (inglês)application/pdf1765309http://www.lume.ufrgs.br/bitstream/10183/100111/1/000919018.pdfce55b9e97db4b27968324bbc7399f147MD51TEXT000919018.pdf.txt000919018.pdf.txtExtracted Texttext/plain25920http://www.lume.ufrgs.br/bitstream/10183/100111/2/000919018.pdf.txta19adaa5c340fef675b8de743243a6ebMD52THUMBNAIL000919018.pdf.jpg000919018.pdf.jpgGenerated Thumbnailimage/jpeg1913http://www.lume.ufrgs.br/bitstream/10183/100111/3/000919018.pdf.jpge1dacb7948937950f517bfbb877cb2fcMD5310183/1001112022-08-17 04:49:54.465786oai:www.lume.ufrgs.br:10183/100111Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2022-08-17T07:49:54Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Metallurgical response of an AISI 4140 steel to different plasma nitriding gas mixtures |
title |
Metallurgical response of an AISI 4140 steel to different plasma nitriding gas mixtures |
spellingShingle |
Metallurgical response of an AISI 4140 steel to different plasma nitriding gas mixtures Skonieski, Adão Felipe Oliveira Nitretação a plasma Aço Propriedades mecânicas Plasma nitriding Mechanical properties Surface composition |
title_short |
Metallurgical response of an AISI 4140 steel to different plasma nitriding gas mixtures |
title_full |
Metallurgical response of an AISI 4140 steel to different plasma nitriding gas mixtures |
title_fullStr |
Metallurgical response of an AISI 4140 steel to different plasma nitriding gas mixtures |
title_full_unstemmed |
Metallurgical response of an AISI 4140 steel to different plasma nitriding gas mixtures |
title_sort |
Metallurgical response of an AISI 4140 steel to different plasma nitriding gas mixtures |
author |
Skonieski, Adão Felipe Oliveira |
author_facet |
Skonieski, Adão Felipe Oliveira Santos, Giovanni Rocha dos Hirsch, Thomas Rocha, Alexandre da Silva |
author_role |
author |
author2 |
Santos, Giovanni Rocha dos Hirsch, Thomas Rocha, Alexandre da Silva |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Skonieski, Adão Felipe Oliveira Santos, Giovanni Rocha dos Hirsch, Thomas Rocha, Alexandre da Silva |
dc.subject.por.fl_str_mv |
Nitretação a plasma Aço Propriedades mecânicas |
topic |
Nitretação a plasma Aço Propriedades mecânicas Plasma nitriding Mechanical properties Surface composition |
dc.subject.eng.fl_str_mv |
Plasma nitriding Mechanical properties Surface composition |
description |
Plasma nitriding is a surface modification process that uses glow discharge to diffuse nitrogen atoms into the metallic matrix of different materials. Among the many possible parameters of the process, the gas mixture composition plays an important role, as it impacts directly the formed layer’s microstructure. In this work an AISI 4140 steel was plasma nitrided under five different gas compositions. The plasma nitriding samples were characterized using optical and scanning electron microscopy, microhardness test, X-ray diffraction and GDOES. The results showed that there are significant microstructural and morphological differences on the formed layers depending on the quantity of nitrogen and methane added to the plasma nitriding atmosphere. Thicknesses of 10, 5 and 2.5 μm were obtained when the nitrogen content of the gas mixtures were varied. The possibility to obtain a compound layer formed mainly by γ’-Fe4N nitrides was also shown. For all studied plasma nitriding conditions, the presence of a compound layer was recognized as being the responsible to hinder the decarburization on the steel surface. The highest value of surface hardness - 1277HV - were measured in the sample which were nitrided with 3vol.% of CH4. |
publishDate |
2013 |
dc.date.issued.fl_str_mv |
2013 |
dc.date.accessioned.fl_str_mv |
2014-08-12T02:10:37Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/other |
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article |
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publishedVersion |
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http://hdl.handle.net/10183/100111 |
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1516-1439 |
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000919018 |
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http://hdl.handle.net/10183/100111 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Materials research : ibero-american journal of materials. São Carlos, SP. Vol. 16, no. 4 (Jul./Ago. 2013), p. 884-890 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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