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Investigating Iron Alloy Phase Changes Using High Temperature In Situ SEM Techniques

This research utilises a novel heat stage combined with a Zeiss scanning electron microscope to investigate phase changes in iron alloys at temperatures up to 800 ℃ using SE and EBSD imaging. Carbon steel samples with starting structures of ferrite/pearlite were transformed into austenite using the...

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Autores principales: Heard, Rhiannon, Siviour, Clive R., Dragnevski, Kalin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9182579/
https://www.ncbi.nlm.nih.gov/pubmed/35683225
http://dx.doi.org/10.3390/ma15113921
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author Heard, Rhiannon
Siviour, Clive R.
Dragnevski, Kalin
author_facet Heard, Rhiannon
Siviour, Clive R.
Dragnevski, Kalin
author_sort Heard, Rhiannon
collection PubMed
description This research utilises a novel heat stage combined with a Zeiss scanning electron microscope to investigate phase changes in iron alloys at temperatures up to 800 ℃ using SE and EBSD imaging. Carbon steel samples with starting structures of ferrite/pearlite were transformed into austenite using the commercial heat treatment process whilst imaging within the SEM. This process facilitates capturing both grain and phase transformation in real time allowing better insight into the microstructural evolution and overall phase change kinetics of this heat treatment. The technique for imaging uses a combination of localised EBSD high temperature imaging combined with the development of high temperature thermal-etching SE imaging technique. The SE thermal etching technique, as verified by EBSD images, enables tracking of a statistically significant number of grains (>100) and identification of individual phases. As well as being applied to carbon steel as shown here, the technique is part of a larger study on high temperature in situ SEM techniques and could be applied to a variety of alloys to study complex phase transformations.
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spelling pubmed-91825792022-06-10 Investigating Iron Alloy Phase Changes Using High Temperature In Situ SEM Techniques Heard, Rhiannon Siviour, Clive R. Dragnevski, Kalin Materials (Basel) Article This research utilises a novel heat stage combined with a Zeiss scanning electron microscope to investigate phase changes in iron alloys at temperatures up to 800 ℃ using SE and EBSD imaging. Carbon steel samples with starting structures of ferrite/pearlite were transformed into austenite using the commercial heat treatment process whilst imaging within the SEM. This process facilitates capturing both grain and phase transformation in real time allowing better insight into the microstructural evolution and overall phase change kinetics of this heat treatment. The technique for imaging uses a combination of localised EBSD high temperature imaging combined with the development of high temperature thermal-etching SE imaging technique. The SE thermal etching technique, as verified by EBSD images, enables tracking of a statistically significant number of grains (>100) and identification of individual phases. As well as being applied to carbon steel as shown here, the technique is part of a larger study on high temperature in situ SEM techniques and could be applied to a variety of alloys to study complex phase transformations. MDPI 2022-05-31 /pmc/articles/PMC9182579/ /pubmed/35683225 http://dx.doi.org/10.3390/ma15113921 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Heard, Rhiannon
Siviour, Clive R.
Dragnevski, Kalin
Investigating Iron Alloy Phase Changes Using High Temperature In Situ SEM Techniques
title Investigating Iron Alloy Phase Changes Using High Temperature In Situ SEM Techniques
title_full Investigating Iron Alloy Phase Changes Using High Temperature In Situ SEM Techniques
title_fullStr Investigating Iron Alloy Phase Changes Using High Temperature In Situ SEM Techniques
title_full_unstemmed Investigating Iron Alloy Phase Changes Using High Temperature In Situ SEM Techniques
title_short Investigating Iron Alloy Phase Changes Using High Temperature In Situ SEM Techniques
title_sort investigating iron alloy phase changes using high temperature in situ sem techniques
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9182579/
https://www.ncbi.nlm.nih.gov/pubmed/35683225
http://dx.doi.org/10.3390/ma15113921
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