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Microstructural fingerprints of phase transitions in shock-loaded iron

The complex structural transformation in crystals under static pressure or shock loading has been a subject of long-standing interest to materials scientists and physicists. The polymorphic transformation is of particular importance for iron (Fe), due to its technological and sociological significan...

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Autores principales: Wang, S. J., Sui, M. L., Chen, Y. T., Lu, Q. H., Ma, E., Pei, X. Y., Li, Q. Z., Hu, H. B.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3548189/
https://www.ncbi.nlm.nih.gov/pubmed/23336068
http://dx.doi.org/10.1038/srep01086
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author Wang, S. J.
Sui, M. L.
Chen, Y. T.
Lu, Q. H.
Ma, E.
Pei, X. Y.
Li, Q. Z.
Hu, H. B.
author_facet Wang, S. J.
Sui, M. L.
Chen, Y. T.
Lu, Q. H.
Ma, E.
Pei, X. Y.
Li, Q. Z.
Hu, H. B.
author_sort Wang, S. J.
collection PubMed
description The complex structural transformation in crystals under static pressure or shock loading has been a subject of long-standing interest to materials scientists and physicists. The polymorphic transformation is of particular importance for iron (Fe), due to its technological and sociological significance in the development of human civilization, as well as its prominent presence in the earth's core. The martensitic transformation α→ε (bcc→hcp) in iron under shock-loading, due to its reversible and transient nature, requires non-trivial detective work to uncover its occurrence. Here we reveal refined microstructural fingerprints, needle-like colonies and three sets of {112}<111> twins with a threefold symmetry, with tell-tale features that are indicative of two sequential martensitic transformations in the reversible α→ε phase transition, even though no ε is retained in the post-shock samples. The signature orientation relationships are consistent with previously-proposed transformation mechanisms, and the unique microstructural fingerprints enable a quantitative assessment of the volume fraction transformed.
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spelling pubmed-35481892013-01-18 Microstructural fingerprints of phase transitions in shock-loaded iron Wang, S. J. Sui, M. L. Chen, Y. T. Lu, Q. H. Ma, E. Pei, X. Y. Li, Q. Z. Hu, H. B. Sci Rep Article The complex structural transformation in crystals under static pressure or shock loading has been a subject of long-standing interest to materials scientists and physicists. The polymorphic transformation is of particular importance for iron (Fe), due to its technological and sociological significance in the development of human civilization, as well as its prominent presence in the earth's core. The martensitic transformation α→ε (bcc→hcp) in iron under shock-loading, due to its reversible and transient nature, requires non-trivial detective work to uncover its occurrence. Here we reveal refined microstructural fingerprints, needle-like colonies and three sets of {112}<111> twins with a threefold symmetry, with tell-tale features that are indicative of two sequential martensitic transformations in the reversible α→ε phase transition, even though no ε is retained in the post-shock samples. The signature orientation relationships are consistent with previously-proposed transformation mechanisms, and the unique microstructural fingerprints enable a quantitative assessment of the volume fraction transformed. Nature Publishing Group 2013-01-18 /pmc/articles/PMC3548189/ /pubmed/23336068 http://dx.doi.org/10.1038/srep01086 Text en Copyright © 2013, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-nd/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/
spellingShingle Article
Wang, S. J.
Sui, M. L.
Chen, Y. T.
Lu, Q. H.
Ma, E.
Pei, X. Y.
Li, Q. Z.
Hu, H. B.
Microstructural fingerprints of phase transitions in shock-loaded iron
title Microstructural fingerprints of phase transitions in shock-loaded iron
title_full Microstructural fingerprints of phase transitions in shock-loaded iron
title_fullStr Microstructural fingerprints of phase transitions in shock-loaded iron
title_full_unstemmed Microstructural fingerprints of phase transitions in shock-loaded iron
title_short Microstructural fingerprints of phase transitions in shock-loaded iron
title_sort microstructural fingerprints of phase transitions in shock-loaded iron
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3548189/
https://www.ncbi.nlm.nih.gov/pubmed/23336068
http://dx.doi.org/10.1038/srep01086
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