Fcc/Hcp martensitic transformation in the Fe-Mn system: Part II. Driving force and thermodynamics of the nucleation process

This article, which continues the series started by Cotes <i>et al.</i> (<i>Metall. Mater. Trans. A</i> , 1995, vol. 26A, p. 1957-69), presents a study of the energetics of the heterogeneous nucleation of hcp martensite in the fcc matrix of the Fe-Mn system. A major goal of t...

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Autores principales:	Cotes, Sonia Marcela, Fernández Guillermet, Armando, Sade, Marcos
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2004
Materias:	Química heterogeneous nucleation of hcp martensite Fe-Mn system Fe-Mn alloys
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/133106
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-133106
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institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Química heterogeneous nucleation of hcp martensite Fe-Mn system Fe-Mn alloys
spellingShingle	Química heterogeneous nucleation of hcp martensite Fe-Mn system Fe-Mn alloys Cotes, Sonia Marcela Fernández Guillermet, Armando Sade, Marcos Fcc/Hcp martensitic transformation in the Fe-Mn system: Part II. Driving force and thermodynamics of the nucleation process
topic_facet	Química heterogeneous nucleation of hcp martensite Fe-Mn system Fe-Mn alloys
description	This article, which continues the series started by Cotes <i>et al.</i> (<i>Metall. Mater. Trans. A</i> , 1995, vol. 26A, p. 1957-69), presents a study of the energetics of the heterogeneous nucleation of hcp martensite in the fcc matrix of the Fe-Mn system. A major goal of the work is the exploration of the various qualitative and quantitative consequences of applying the Olson and Cohen approach (OCA) to the most reliable information on the Fe-Mn system. To this end, an extensive assessment of the quantities involved in the OCA is performed. The selected Gibbs energy and the lattice parameter descriptions for fcc and hcp are based on recent experimental studies. Explicit calculations are presented of the key quantities in the OCA, including those quantities that have not yet been measured. In particular, a probable range of values is established for the surface energy parameter σ, which plays a crucial role in the treatment of the nucleation size. On these bases, values are derived for the probable number of atomic planes ( n <sub>C</sub>) of the embryo, which, according to the OCA, is at the condition of spontaneous growth. Predictions of the Mn content upon n <sub>C</sub> are also reported. The present attempt to calculate in detail the energetics of the fcc <sup>-</sup>hcp martensitic transformation also revealed the lack of thermophysical data for Fe-Mn alloys. The need for experimental studies of various relevant quantities is emphasized.
format	Articulo Articulo
author	Cotes, Sonia Marcela Fernández Guillermet, Armando Sade, Marcos
author_facet	Cotes, Sonia Marcela Fernández Guillermet, Armando Sade, Marcos
author_sort	Cotes, Sonia Marcela
title	Fcc/Hcp martensitic transformation in the Fe-Mn system: Part II. Driving force and thermodynamics of the nucleation process
title_short	Fcc/Hcp martensitic transformation in the Fe-Mn system: Part II. Driving force and thermodynamics of the nucleation process
title_full	Fcc/Hcp martensitic transformation in the Fe-Mn system: Part II. Driving force and thermodynamics of the nucleation process
title_fullStr	Fcc/Hcp martensitic transformation in the Fe-Mn system: Part II. Driving force and thermodynamics of the nucleation process
title_full_unstemmed	Fcc/Hcp martensitic transformation in the Fe-Mn system: Part II. Driving force and thermodynamics of the nucleation process
title_sort	fcc/hcp martensitic transformation in the fe-mn system: part ii. driving force and thermodynamics of the nucleation process
publishDate	2004
url	http://sedici.unlp.edu.ar/handle/10915/133106
work_keys_str_mv	AT cotessoniamarcela fcchcpmartensitictransformationinthefemnsystempartiidrivingforceandthermodynamicsofthenucleationprocess AT fernandezguillermetarmando fcchcpmartensitictransformationinthefemnsystempartiidrivingforceandthermodynamicsofthenucleationprocess AT sademarcos fcchcpmartensitictransformationinthefemnsystempartiidrivingforceandthermodynamicsofthenucleationprocess
bdutipo_str	Repositorios
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Fcc/Hcp martensitic transformation in the Fe-Mn system: Part II. Driving force and thermodynamics of the nucleation process

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