Improving the integrity and the microstructural features of electron beam welds of a creep-resistant martensitic steel by local (de-)alloying
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/10362/104931 |
Resumo: | Martensitic 9–12% chromium steels present the most preferred material group for high-temperature components in thermal power plants. Previous investigations revealed that due to the use of a creep-resistant martensitic steel strengthened with boron and nitrogen (MarBN), the minimum creep rate can significantly be decreased. Furthermore, the formation of the fine-grained heat-affected zone (FGHAZ) due to welding can be suppressed. This FGHAZ is subject to the most dominant failure mode (type IV cracking) of welded joints during creep exposure. By using electron beam welding, the total width of the heat-affected zone (HAZ) can be reduced compared to conventional arc welding processes. Preceding investigation on electron beam welding of MarBN steel showed recurring difficulties with hot cracking within the fusion zone. Various approaches were tried to produce defect-free welds without the use of any filler metal, but no satisfactory results were achieved. In this investigation, the chemical composition of the fusion zone was modified by the addition of conventional 9% chromium creep-resistant steel as a filler material. By using the filler material, the fusion zone was locally (de-)alloyed and defect-free joints of MarBN steel were produced. |
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Improving the integrity and the microstructural features of electron beam welds of a creep-resistant martensitic steel by local (de-)alloying9–12% Cr steelsEBWFocus wobblingLocal (de-)alloyingMarBN steelWelding of large cross sectionsMechanics of MaterialsMechanical EngineeringMetals and AlloysMartensitic 9–12% chromium steels present the most preferred material group for high-temperature components in thermal power plants. Previous investigations revealed that due to the use of a creep-resistant martensitic steel strengthened with boron and nitrogen (MarBN), the minimum creep rate can significantly be decreased. Furthermore, the formation of the fine-grained heat-affected zone (FGHAZ) due to welding can be suppressed. This FGHAZ is subject to the most dominant failure mode (type IV cracking) of welded joints during creep exposure. By using electron beam welding, the total width of the heat-affected zone (HAZ) can be reduced compared to conventional arc welding processes. Preceding investigation on electron beam welding of MarBN steel showed recurring difficulties with hot cracking within the fusion zone. Various approaches were tried to produce defect-free welds without the use of any filler metal, but no satisfactory results were achieved. In this investigation, the chemical composition of the fusion zone was modified by the addition of conventional 9% chromium creep-resistant steel as a filler material. By using the filler material, the fusion zone was locally (de-)alloyed and defect-free joints of MarBN steel were produced.UNINOVA-Instituto de Desenvolvimento de Novas TecnologiasRUNRabl, AntoniaPixner, FlorianDuarte, BrunoBlatesic, DanijelBéal, ColineEnzinger, Norbert2020-09-29T22:22:09Z2019-03-082019-03-08T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article8application/pdfhttp://hdl.handle.net/10362/104931eng0043-2288PURE: 18731268https://doi.org/10.1007/s40194-018-00686-winfo: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:RCAAP2024-03-11T04:50:22Zoai:run.unl.pt:10362/104931Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:40:21.982119Repositório 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 |
Improving the integrity and the microstructural features of electron beam welds of a creep-resistant martensitic steel by local (de-)alloying |
title |
Improving the integrity and the microstructural features of electron beam welds of a creep-resistant martensitic steel by local (de-)alloying |
spellingShingle |
Improving the integrity and the microstructural features of electron beam welds of a creep-resistant martensitic steel by local (de-)alloying Rabl, Antonia 9–12% Cr steels EBW Focus wobbling Local (de-)alloying MarBN steel Welding of large cross sections Mechanics of Materials Mechanical Engineering Metals and Alloys |
title_short |
Improving the integrity and the microstructural features of electron beam welds of a creep-resistant martensitic steel by local (de-)alloying |
title_full |
Improving the integrity and the microstructural features of electron beam welds of a creep-resistant martensitic steel by local (de-)alloying |
title_fullStr |
Improving the integrity and the microstructural features of electron beam welds of a creep-resistant martensitic steel by local (de-)alloying |
title_full_unstemmed |
Improving the integrity and the microstructural features of electron beam welds of a creep-resistant martensitic steel by local (de-)alloying |
title_sort |
Improving the integrity and the microstructural features of electron beam welds of a creep-resistant martensitic steel by local (de-)alloying |
author |
Rabl, Antonia |
author_facet |
Rabl, Antonia Pixner, Florian Duarte, Bruno Blatesic, Danijel Béal, Coline Enzinger, Norbert |
author_role |
author |
author2 |
Pixner, Florian Duarte, Bruno Blatesic, Danijel Béal, Coline Enzinger, Norbert |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
UNINOVA-Instituto de Desenvolvimento de Novas Tecnologias RUN |
dc.contributor.author.fl_str_mv |
Rabl, Antonia Pixner, Florian Duarte, Bruno Blatesic, Danijel Béal, Coline Enzinger, Norbert |
dc.subject.por.fl_str_mv |
9–12% Cr steels EBW Focus wobbling Local (de-)alloying MarBN steel Welding of large cross sections Mechanics of Materials Mechanical Engineering Metals and Alloys |
topic |
9–12% Cr steels EBW Focus wobbling Local (de-)alloying MarBN steel Welding of large cross sections Mechanics of Materials Mechanical Engineering Metals and Alloys |
description |
Martensitic 9–12% chromium steels present the most preferred material group for high-temperature components in thermal power plants. Previous investigations revealed that due to the use of a creep-resistant martensitic steel strengthened with boron and nitrogen (MarBN), the minimum creep rate can significantly be decreased. Furthermore, the formation of the fine-grained heat-affected zone (FGHAZ) due to welding can be suppressed. This FGHAZ is subject to the most dominant failure mode (type IV cracking) of welded joints during creep exposure. By using electron beam welding, the total width of the heat-affected zone (HAZ) can be reduced compared to conventional arc welding processes. Preceding investigation on electron beam welding of MarBN steel showed recurring difficulties with hot cracking within the fusion zone. Various approaches were tried to produce defect-free welds without the use of any filler metal, but no satisfactory results were achieved. In this investigation, the chemical composition of the fusion zone was modified by the addition of conventional 9% chromium creep-resistant steel as a filler material. By using the filler material, the fusion zone was locally (de-)alloyed and defect-free joints of MarBN steel were produced. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-03-08 2019-03-08T00:00:00Z 2020-09-29T22:22:09Z |
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/10362/104931 |
url |
http://hdl.handle.net/10362/104931 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0043-2288 PURE: 18731268 https://doi.org/10.1007/s40194-018-00686-w |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
8 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 instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
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 |
repository.mail.fl_str_mv |
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1799138018746957824 |