Meta-equilibrium transition microstructure for maximum austenite stability and minimum hardness in a Ti-stabilized supermartensitic stainless steel

Detalhes bibliográficos
Autor(a) principal: Escobar, J. D.
Data de Publicação: 2018
Outros Autores: Oliveira, J. P., Salvador, C. A. F., Faria, G. A., Poplawsky, J. D., Rodriguez, J., Mei, P. R., Babu, S. S., Ramirez, A. J.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: https://doi.org/10.1016/j.matdes.2018.07.018
Resumo: The authors acknowledge the XTMS beamline members, the Brazilian Synchrotron Light Source (LNLS) and the Metals Characterization and Processing group (CPM) at the Brazilian Nanotechnology National Laboratory (LNNano) for the support with the diffraction experiments; Villares Metals S.A. for the donation of the materials; and CNPq-SWE 02766/2014-4, FAPESP (2014/20844-1), FAPESP (2016/13466-6) for the PhD funding. APT was conducted at ORNL's Center for Nanophase Materials Sciences (CNMS), which is a U.S. DOE Office of Science User Facility.
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spelling Meta-equilibrium transition microstructure for maximum austenite stability and minimum hardness in a Ti-stabilized supermartensitic stainless steelAtom Probe TomographyAustenite reversionIsothermal tempering treatmentsSynchrotron diffractionMaterials Science(all)Mechanics of MaterialsMechanical EngineeringThe authors acknowledge the XTMS beamline members, the Brazilian Synchrotron Light Source (LNLS) and the Metals Characterization and Processing group (CPM) at the Brazilian Nanotechnology National Laboratory (LNNano) for the support with the diffraction experiments; Villares Metals S.A. for the donation of the materials; and CNPq-SWE 02766/2014-4, FAPESP (2014/20844-1), FAPESP (2016/13466-6) for the PhD funding. APT was conducted at ORNL's Center for Nanophase Materials Sciences (CNMS), which is a U.S. DOE Office of Science User Facility.The maximization of stable reverted austenite at room temperature through inter-critical tempering is a widely used method to reduce hardness in supermartensitic stainless steels. Nevertheless, partial martensitic transformation might occur due to insufficient compositional stabilization. In this work, we conducted a time-resolved triple-step inter-critical tempering, specially designed to obtain maximum austenite stability and minimum hardness through the progressive suppression of the martensitic transformation. The mechanism behind the progressive increase in stable reverted austenite was the generation of a meta-equilibrium state, which imposed a limit in both high temperature austenite reversion and room temperature austenite stabilization. Such limit corresponded to the high temperature volume fraction of austenite, obtained right before cooling from the first cycle. This effect was associated to the Ni-rich fresh martensite laths acting as local Ni compositional pockets, providing site-specific austenite reversion; and to the suppression of any additional nucleation at the Ni-poor matrix as the T0 temperature for austenite reversion was strongly increased. The softening mechanism was mainly controlled by the carbon arrest effect by the precipitation of Ti (C, N), which was completed after the first tempering cycle. Nevertheless, maximizing reverted austenite and suppressing fresh martensite at room temperature did not result in additional hardness reductions.DEMI - Departamento de Engenharia Mecânica e IndustrialUNIDEMI - Unidade de Investigação e Desenvolvimento em Engenharia Mecânica e IndustrialRUNEscobar, J. D.Oliveira, J. P.Salvador, C. A. F.Faria, G. A.Poplawsky, J. D.Rodriguez, J.Mei, P. R.Babu, S. S.Ramirez, A. J.2019-04-11T22:11:01Z2018-10-152018-10-15T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article13application/pdfhttps://doi.org/10.1016/j.matdes.2018.07.018eng0264-1275PURE: 11863848http://www.scopus.com/inward/record.url?scp=85050086353&partnerID=8YFLogxKhttps://doi.org/10.1016/j.matdes.2018.07.018info: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:RCAAP2024-03-11T04:31:36Zoai:run.unl.pt:10362/66361Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:34:30.795295Repositório 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 Meta-equilibrium transition microstructure for maximum austenite stability and minimum hardness in a Ti-stabilized supermartensitic stainless steel
title Meta-equilibrium transition microstructure for maximum austenite stability and minimum hardness in a Ti-stabilized supermartensitic stainless steel
spellingShingle Meta-equilibrium transition microstructure for maximum austenite stability and minimum hardness in a Ti-stabilized supermartensitic stainless steel
Escobar, J. D.
Atom Probe Tomography
Austenite reversion
Isothermal tempering treatments
Synchrotron diffraction
Materials Science(all)
Mechanics of Materials
Mechanical Engineering
title_short Meta-equilibrium transition microstructure for maximum austenite stability and minimum hardness in a Ti-stabilized supermartensitic stainless steel
title_full Meta-equilibrium transition microstructure for maximum austenite stability and minimum hardness in a Ti-stabilized supermartensitic stainless steel
title_fullStr Meta-equilibrium transition microstructure for maximum austenite stability and minimum hardness in a Ti-stabilized supermartensitic stainless steel
title_full_unstemmed Meta-equilibrium transition microstructure for maximum austenite stability and minimum hardness in a Ti-stabilized supermartensitic stainless steel
title_sort Meta-equilibrium transition microstructure for maximum austenite stability and minimum hardness in a Ti-stabilized supermartensitic stainless steel
author Escobar, J. D.
author_facet Escobar, J. D.
Oliveira, J. P.
Salvador, C. A. F.
Faria, G. A.
Poplawsky, J. D.
Rodriguez, J.
Mei, P. R.
Babu, S. S.
Ramirez, A. J.
author_role author
author2 Oliveira, J. P.
Salvador, C. A. F.
Faria, G. A.
Poplawsky, J. D.
Rodriguez, J.
Mei, P. R.
Babu, S. S.
Ramirez, A. J.
author2_role author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv DEMI - Departamento de Engenharia Mecânica e Industrial
UNIDEMI - Unidade de Investigação e Desenvolvimento em Engenharia Mecânica e Industrial
RUN
dc.contributor.author.fl_str_mv Escobar, J. D.
Oliveira, J. P.
Salvador, C. A. F.
Faria, G. A.
Poplawsky, J. D.
Rodriguez, J.
Mei, P. R.
Babu, S. S.
Ramirez, A. J.
dc.subject.por.fl_str_mv Atom Probe Tomography
Austenite reversion
Isothermal tempering treatments
Synchrotron diffraction
Materials Science(all)
Mechanics of Materials
Mechanical Engineering
topic Atom Probe Tomography
Austenite reversion
Isothermal tempering treatments
Synchrotron diffraction
Materials Science(all)
Mechanics of Materials
Mechanical Engineering
description The authors acknowledge the XTMS beamline members, the Brazilian Synchrotron Light Source (LNLS) and the Metals Characterization and Processing group (CPM) at the Brazilian Nanotechnology National Laboratory (LNNano) for the support with the diffraction experiments; Villares Metals S.A. for the donation of the materials; and CNPq-SWE 02766/2014-4, FAPESP (2014/20844-1), FAPESP (2016/13466-6) for the PhD funding. APT was conducted at ORNL's Center for Nanophase Materials Sciences (CNMS), which is a U.S. DOE Office of Science User Facility.
publishDate 2018
dc.date.none.fl_str_mv 2018-10-15
2018-10-15T00:00:00Z
2019-04-11T22:11:01Z
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 https://doi.org/10.1016/j.matdes.2018.07.018
url https://doi.org/10.1016/j.matdes.2018.07.018
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 0264-1275
PURE: 11863848
http://www.scopus.com/inward/record.url?scp=85050086353&partnerID=8YFLogxK
https://doi.org/10.1016/j.matdes.2018.07.018
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 13
application/pdf
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
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instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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