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Dilatometric Study of Phase Transformations in 5 Mn Steel Subjected to Different Heat Treatments
The work presents results of phase transformation kinetics of hot-rolled 5% Mn steel subjected to different heat treatments. Three different schedules were introduced: isothermal holding in a bainite region, coiling simulation and intercritical annealing. The evolution of microstructure components w...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7079595/ https://www.ncbi.nlm.nih.gov/pubmed/32098018 http://dx.doi.org/10.3390/ma13040958 |
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author | Morawiec, Mateusz Grajcar, Adam Zalecki, Władysław Garcia-Mateo, Carlos Opiela, Marek |
author_facet | Morawiec, Mateusz Grajcar, Adam Zalecki, Władysław Garcia-Mateo, Carlos Opiela, Marek |
author_sort | Morawiec, Mateusz |
collection | PubMed |
description | The work presents results of phase transformation kinetics of hot-rolled 5% Mn steel subjected to different heat treatments. Three different schedules were introduced: isothermal holding in a bainite region, coiling simulation and intercritical annealing. The evolution of microstructure components was investigated using dilatometric and metallographic analyses. According to obtained results, the medium-Mn steel exhibits high resistance for γ/α transformation during the bainite transformation and coiling simulation (upon cooling from the austenite region). During 5 h isothermal holding, no bainite and/or ferrite formation was detected. This results in the formation of martensite upon cooling to room temperature. Differently, when the steel was subjected to the intercritical annealing at 720 and 700 °C (upon heating from room temperature), a final microstructure consisted of ferrite, martensite and retained austenite. At 700 °C, no fresh martensite formation was detected upon cooling to room temperature. This means that the austenite was enriched in carbon during the intercritical annealing step enough to keep its thermal stability. |
format | Online Article Text |
id | pubmed-7079595 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-70795952020-03-24 Dilatometric Study of Phase Transformations in 5 Mn Steel Subjected to Different Heat Treatments Morawiec, Mateusz Grajcar, Adam Zalecki, Władysław Garcia-Mateo, Carlos Opiela, Marek Materials (Basel) Article The work presents results of phase transformation kinetics of hot-rolled 5% Mn steel subjected to different heat treatments. Three different schedules were introduced: isothermal holding in a bainite region, coiling simulation and intercritical annealing. The evolution of microstructure components was investigated using dilatometric and metallographic analyses. According to obtained results, the medium-Mn steel exhibits high resistance for γ/α transformation during the bainite transformation and coiling simulation (upon cooling from the austenite region). During 5 h isothermal holding, no bainite and/or ferrite formation was detected. This results in the formation of martensite upon cooling to room temperature. Differently, when the steel was subjected to the intercritical annealing at 720 and 700 °C (upon heating from room temperature), a final microstructure consisted of ferrite, martensite and retained austenite. At 700 °C, no fresh martensite formation was detected upon cooling to room temperature. This means that the austenite was enriched in carbon during the intercritical annealing step enough to keep its thermal stability. MDPI 2020-02-21 /pmc/articles/PMC7079595/ /pubmed/32098018 http://dx.doi.org/10.3390/ma13040958 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Morawiec, Mateusz Grajcar, Adam Zalecki, Władysław Garcia-Mateo, Carlos Opiela, Marek Dilatometric Study of Phase Transformations in 5 Mn Steel Subjected to Different Heat Treatments |
title | Dilatometric Study of Phase Transformations in 5 Mn Steel Subjected to Different Heat Treatments |
title_full | Dilatometric Study of Phase Transformations in 5 Mn Steel Subjected to Different Heat Treatments |
title_fullStr | Dilatometric Study of Phase Transformations in 5 Mn Steel Subjected to Different Heat Treatments |
title_full_unstemmed | Dilatometric Study of Phase Transformations in 5 Mn Steel Subjected to Different Heat Treatments |
title_short | Dilatometric Study of Phase Transformations in 5 Mn Steel Subjected to Different Heat Treatments |
title_sort | dilatometric study of phase transformations in 5 mn steel subjected to different heat treatments |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7079595/ https://www.ncbi.nlm.nih.gov/pubmed/32098018 http://dx.doi.org/10.3390/ma13040958 |
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