Structural-and-Phase Transformations in Fe-4.10 and 7.25 at.% Mn Alloys under Intensity External Actions

The effect of high-pressure torsion (HPT) (P = 8 GPa, e = 5.9) and irradiation with continuous beams of Ar+ ions with energy E = 15 keV on the atomic structure and phase composition of initially quenched iron alloys with...

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Autores principales:	Vladimir V. Ovchinnikov, Efrem V. Makarov, Natalia V. Gushchina
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	Fe-Mn alloy ion irradiation austenite formation severe plastic deformation high-pressure torsion long-range effects Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/3195deb0f66749dda6283c8296d9e9f5
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spelling	oai:doaj.org-article:3195deb0f66749dda6283c8296d9e9f52021-11-25T18:21:03ZStructural-and-Phase Transformations in Fe-4.10 and 7.25 at.% Mn Alloys under Intensity External Actions10.3390/met111116672075-4701https://doaj.org/article/3195deb0f66749dda6283c8296d9e9f52021-10-01T00:00:00Zhttps://www.mdpi.com/2075-4701/11/11/1667https://doaj.org/toc/2075-4701The effect of high-pressure torsion (HPT) (<i>P</i> = 8 GPa, <i>e</i> = 5.9) and irradiation with continuous beams of Ar<sup>+</sup> ions with energy <i>E</i> = 15 keV on the atomic structure and phase composition of initially quenched iron alloys with 4.10 and 7.25 at.% Mn was studied by the method of Mössbauer spectroscopy. The supersaturated α-solid solution of Fe-7.25 at.% Mn, in contrast to the stable Fe-4.10 at.% Mn, which passes into a highly nonequilibrium metastable state as a result of HPT deformation, is transformed under the influence of ion irradiation at an abnormally low temperature of 280 °C into a two-phase α + γ-state with a highly enriched γ-phase (austenite) (38.4 at.% Mn) and a depleted α-solid solution with 5.76 at.% Mn. The rapid processes with the formation of the γ-phase with a concentration of Mn close to the extrapolation estimate using the equilibrium phase diagram are explained by the cascade radiation shaking of the material by post-cascade powerful elastic and shock waves. Cascade radiation shaking plays the role of temperature and opens up the possibility of achieving states close to equilibrium in the absence of thermally activated processes at record low temperatures.Vladimir V. OvchinnikovEfrem V. MakarovNatalia V. GushchinaMDPI AGarticleFe-Mn alloyion irradiationaustenite formationsevere plastic deformationhigh-pressure torsionlong-range effectsMining engineering. MetallurgyTN1-997ENMetals, Vol 11, Iss 1667, p 1667 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Fe-Mn alloy ion irradiation austenite formation severe plastic deformation high-pressure torsion long-range effects Mining engineering. Metallurgy TN1-997
spellingShingle	Fe-Mn alloy ion irradiation austenite formation severe plastic deformation high-pressure torsion long-range effects Mining engineering. Metallurgy TN1-997 Vladimir V. Ovchinnikov Efrem V. Makarov Natalia V. Gushchina Structural-and-Phase Transformations in Fe-4.10 and 7.25 at.% Mn Alloys under Intensity External Actions
description	The effect of high-pressure torsion (HPT) (<i>P</i> = 8 GPa, <i>e</i> = 5.9) and irradiation with continuous beams of Ar<sup>+</sup> ions with energy <i>E</i> = 15 keV on the atomic structure and phase composition of initially quenched iron alloys with 4.10 and 7.25 at.% Mn was studied by the method of Mössbauer spectroscopy. The supersaturated α-solid solution of Fe-7.25 at.% Mn, in contrast to the stable Fe-4.10 at.% Mn, which passes into a highly nonequilibrium metastable state as a result of HPT deformation, is transformed under the influence of ion irradiation at an abnormally low temperature of 280 °C into a two-phase α + γ-state with a highly enriched γ-phase (austenite) (38.4 at.% Mn) and a depleted α-solid solution with 5.76 at.% Mn. The rapid processes with the formation of the γ-phase with a concentration of Mn close to the extrapolation estimate using the equilibrium phase diagram are explained by the cascade radiation shaking of the material by post-cascade powerful elastic and shock waves. Cascade radiation shaking plays the role of temperature and opens up the possibility of achieving states close to equilibrium in the absence of thermally activated processes at record low temperatures.
format	article
author	Vladimir V. Ovchinnikov Efrem V. Makarov Natalia V. Gushchina
author_facet	Vladimir V. Ovchinnikov Efrem V. Makarov Natalia V. Gushchina
author_sort	Vladimir V. Ovchinnikov
title	Structural-and-Phase Transformations in Fe-4.10 and 7.25 at.% Mn Alloys under Intensity External Actions
title_short	Structural-and-Phase Transformations in Fe-4.10 and 7.25 at.% Mn Alloys under Intensity External Actions
title_full	Structural-and-Phase Transformations in Fe-4.10 and 7.25 at.% Mn Alloys under Intensity External Actions
title_fullStr	Structural-and-Phase Transformations in Fe-4.10 and 7.25 at.% Mn Alloys under Intensity External Actions
title_full_unstemmed	Structural-and-Phase Transformations in Fe-4.10 and 7.25 at.% Mn Alloys under Intensity External Actions
title_sort	structural-and-phase transformations in fe-4.10 and 7.25 at.% mn alloys under intensity external actions
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/3195deb0f66749dda6283c8296d9e9f5
work_keys_str_mv	AT vladimirvovchinnikov structuralandphasetransformationsinfe410and725atmnalloysunderintensityexternalactions AT efremvmakarov structuralandphasetransformationsinfe410and725atmnalloysunderintensityexternalactions AT nataliavgushchina structuralandphasetransformationsinfe410and725atmnalloysunderintensityexternalactions
_version_	1718411310217035776

Structural-and-Phase Transformations in Fe-4.10 and 7.25 at.% Mn Alloys under Intensity External Actions

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