Excellent mechanical properties of taenite in meteoric iron

Abstract Meteoric iron is the metal that humans first obtained and used in the earliest stage of metal culture. Advances in metallographic analysis techniques have revealed that meteoric iron largely comprises kamacite, taenite, and cohenite, which correspond to ferrite, austenite, and cementite in...

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Autores principales:	Shohei Ueki, Yoji Mine, Kazuki Takashima
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/182d65bb6b5440edbe05307f98c1804a
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spelling	oai:doaj.org-article:182d65bb6b5440edbe05307f98c1804a2021-12-02T11:35:53ZExcellent mechanical properties of taenite in meteoric iron10.1038/s41598-021-83792-y2045-2322https://doaj.org/article/182d65bb6b5440edbe05307f98c1804a2021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-83792-yhttps://doaj.org/toc/2045-2322Abstract Meteoric iron is the metal that humans first obtained and used in the earliest stage of metal culture. Advances in metallographic analysis techniques have revealed that meteoric iron largely comprises kamacite, taenite, and cohenite, which correspond to ferrite, austenite, and cementite in artificial steel, respectively. Although the mechanical properties of meteoric irons were measured previously to understand their origin and history, the genuine mechanical properties of meteoric iron remain unknown because of its complex microstructure and the pre-existing cracks in cohenite. Using micro-tensile tests to analyse the single-crystalline constituents of the Canyon Diablo meteorite, herein, we show that the taenite matrix exhibits excellent balance between yield strength and ductility superior to that of the kamacite matrix. We found that taenite is rich in nitrogen despite containing a large amount of nickel, which decreases the nitrogen solubility, suggesting that solid-solution strengthening via nitrogen is highly effective for the Fe–Ni system. Our findings not only provide insights for developing advanced high-strength steel but also help understand the mysterious relationship between nitrogen and nickel contents in steel. Like ancient peoples believed that meteoric iron was a gift from the heavens, the findings herein imply that this thought continues even now.Shohei UekiYoji MineKazuki TakashimaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Shohei Ueki Yoji Mine Kazuki Takashima Excellent mechanical properties of taenite in meteoric iron
description	Abstract Meteoric iron is the metal that humans first obtained and used in the earliest stage of metal culture. Advances in metallographic analysis techniques have revealed that meteoric iron largely comprises kamacite, taenite, and cohenite, which correspond to ferrite, austenite, and cementite in artificial steel, respectively. Although the mechanical properties of meteoric irons were measured previously to understand their origin and history, the genuine mechanical properties of meteoric iron remain unknown because of its complex microstructure and the pre-existing cracks in cohenite. Using micro-tensile tests to analyse the single-crystalline constituents of the Canyon Diablo meteorite, herein, we show that the taenite matrix exhibits excellent balance between yield strength and ductility superior to that of the kamacite matrix. We found that taenite is rich in nitrogen despite containing a large amount of nickel, which decreases the nitrogen solubility, suggesting that solid-solution strengthening via nitrogen is highly effective for the Fe–Ni system. Our findings not only provide insights for developing advanced high-strength steel but also help understand the mysterious relationship between nitrogen and nickel contents in steel. Like ancient peoples believed that meteoric iron was a gift from the heavens, the findings herein imply that this thought continues even now.
format	article
author	Shohei Ueki Yoji Mine Kazuki Takashima
author_facet	Shohei Ueki Yoji Mine Kazuki Takashima
author_sort	Shohei Ueki
title	Excellent mechanical properties of taenite in meteoric iron
title_short	Excellent mechanical properties of taenite in meteoric iron
title_full	Excellent mechanical properties of taenite in meteoric iron
title_fullStr	Excellent mechanical properties of taenite in meteoric iron
title_full_unstemmed	Excellent mechanical properties of taenite in meteoric iron
title_sort	excellent mechanical properties of taenite in meteoric iron
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/182d65bb6b5440edbe05307f98c1804a
work_keys_str_mv	AT shoheiueki excellentmechanicalpropertiesoftaeniteinmeteoriciron AT yojimine excellentmechanicalpropertiesoftaeniteinmeteoriciron AT kazukitakashima excellentmechanicalpropertiesoftaeniteinmeteoriciron
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Excellent mechanical properties of taenite in meteoric iron

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