Two design strategies for enhancing the thermal stability of bainitic structures

In response to the growing interest of the industry in advanced high-strength steels subjected to extreme operating conditions, two novel grades BainTS and BainNiAlCu bainitic steels have been developed. Since the in-use properties of bainitic steel are directly related to the thermal stability of t...

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Autores: Królicka, Aleksandra, García Caballero, Francisca, Kuziak, Roman, Radwański, Krzysztof, Sozańska-Jędrasik, Liwia, Stawarczyk, Piotr
Tipo de recurso: artículo
Fecha de publicación:2023
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/341031
Acceso en línea:http://hdl.handle.net/10261/341031
Access Level:acceso abierto
Palabra clave:Retained austenite stability
Nanostructured bainite
Tempered bainite
Decomposition of retained austenite
Secondary hardening
Intermetallic strengthening
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spelling Two design strategies for enhancing the thermal stability of bainitic structuresKrólicka, AleksandraGarcía Caballero, FranciscaKuziak, RomanRadwański, KrzysztofSozańska-Jędrasik, LiwiaStawarczyk, PiotrRetained austenite stabilityNanostructured bainiteTempered bainiteDecomposition of retained austeniteSecondary hardeningIntermetallic strengtheningIn response to the growing interest of the industry in advanced high-strength steels subjected to extreme operating conditions, two novel grades BainTS and BainNiAlCu bainitic steels have been developed. Since the in-use properties of bainitic steel are directly related to the thermal stability of the bainitic structure, two different alloy design concepts to improve tempering resistance considering various strengthening mechanisms were proposed. BainTS steel follows the standard assumptions of nanocrystalline bainitic steel design, where the retained austenite is stabilized with silicon. A potential secondary hardening was also considered using Cr, Mo, and V alloying additives. On the other hand, BainNiAlCu steel was designed taking into account the precipitation strengthening with intermetallic compounds (nickel aluminide and copper particles). It was revealed that both steels after heat treatment consist of bainitic ferrite laths and a significant content of retained austenite (above 25%) with film and blocky morphologies. After the tempering process (350 °C–650 °C), there was significant structural evolution following the gradual decomposition of the metastable bainitic structure. It was proved that BainTS steel is characterized by the higher thermal stability of both bainitic ferrite and retained austenite compared to BainNiAlCu. Despite this, the hardening effect after tempering BainNiAlCu steel was higher (by about 140 HV compared to heat treatment, approx. 30% increase). The presented results suggest that bainitic steels strengthened with intermetallic phases are extremely promising in the context of future industrialization in applications where operating conditions are exposed to elevated temperatures.The authors would like to acknowledge Dr. Andrzej Żak (Wrocław University of Science and Technology) for his support in conducting part of the investigations and for valuable proofreading. This work was supported by the National Science Centre (Preludium Project, No. 2020/37/N/ST8/03324, title: “The concept of high-strength, thermal stable nanostructured bainitic steel with increased weldability”). Part of the investigations was carried out with the support of The Polish National Agency for Academic Exchange, The Bekker Programme, title: “Modeling of the multi-phase structure of nanostructured bainitic steels focused on improving their technological properties".ElsevierWrocław University of Science and TechnologyNational Science Centre (Poland)Polish National Agency for Academic ExchangeConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2023202320232023info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/341031reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.1016/j.jmrt.2023.05.003Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3410312026-05-22T06:33:51Z
dc.title.none.fl_str_mv Two design strategies for enhancing the thermal stability of bainitic structures
title Two design strategies for enhancing the thermal stability of bainitic structures
spellingShingle Two design strategies for enhancing the thermal stability of bainitic structures
Królicka, Aleksandra
Retained austenite stability
Nanostructured bainite
Tempered bainite
Decomposition of retained austenite
Secondary hardening
Intermetallic strengthening
title_short Two design strategies for enhancing the thermal stability of bainitic structures
title_full Two design strategies for enhancing the thermal stability of bainitic structures
title_fullStr Two design strategies for enhancing the thermal stability of bainitic structures
title_full_unstemmed Two design strategies for enhancing the thermal stability of bainitic structures
title_sort Two design strategies for enhancing the thermal stability of bainitic structures
dc.creator.none.fl_str_mv Królicka, Aleksandra
García Caballero, Francisca
Kuziak, Roman
Radwański, Krzysztof
Sozańska-Jędrasik, Liwia
Stawarczyk, Piotr
author Królicka, Aleksandra
author_facet Królicka, Aleksandra
García Caballero, Francisca
Kuziak, Roman
Radwański, Krzysztof
Sozańska-Jędrasik, Liwia
Stawarczyk, Piotr
author_role author
author2 García Caballero, Francisca
Kuziak, Roman
Radwański, Krzysztof
Sozańska-Jędrasik, Liwia
Stawarczyk, Piotr
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Wrocław University of Science and Technology
National Science Centre (Poland)
Polish National Agency for Academic Exchange
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Retained austenite stability
Nanostructured bainite
Tempered bainite
Decomposition of retained austenite
Secondary hardening
Intermetallic strengthening
topic Retained austenite stability
Nanostructured bainite
Tempered bainite
Decomposition of retained austenite
Secondary hardening
Intermetallic strengthening
description In response to the growing interest of the industry in advanced high-strength steels subjected to extreme operating conditions, two novel grades BainTS and BainNiAlCu bainitic steels have been developed. Since the in-use properties of bainitic steel are directly related to the thermal stability of the bainitic structure, two different alloy design concepts to improve tempering resistance considering various strengthening mechanisms were proposed. BainTS steel follows the standard assumptions of nanocrystalline bainitic steel design, where the retained austenite is stabilized with silicon. A potential secondary hardening was also considered using Cr, Mo, and V alloying additives. On the other hand, BainNiAlCu steel was designed taking into account the precipitation strengthening with intermetallic compounds (nickel aluminide and copper particles). It was revealed that both steels after heat treatment consist of bainitic ferrite laths and a significant content of retained austenite (above 25%) with film and blocky morphologies. After the tempering process (350 °C–650 °C), there was significant structural evolution following the gradual decomposition of the metastable bainitic structure. It was proved that BainTS steel is characterized by the higher thermal stability of both bainitic ferrite and retained austenite compared to BainNiAlCu. Despite this, the hardening effect after tempering BainNiAlCu steel was higher (by about 140 HV compared to heat treatment, approx. 30% increase). The presented results suggest that bainitic steels strengthened with intermetallic phases are extremely promising in the context of future industrialization in applications where operating conditions are exposed to elevated temperatures.
publishDate 2023
dc.date.none.fl_str_mv 2023
2023
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/341031
url http://hdl.handle.net/10261/341031
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1016/j.jmrt.2023.05.003
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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