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X-ray line profile analysis of the ball-milled Fe-30Co alloy

This work deals with the microstructural properties of the Fe-30Co alloy prepared by ball milling of elemental iron and cobalt powders. The obtained mixed powder has been characterized by means of scanning electron microscope, X-ray microanalysis, laser diffraction, X-ray diffraction and microhardness measurements. X-ray line profile analysis based on the Rietveld method and adopting two different models has been used for the microstructural study. The refinement of the X-ray patterns shows that after 3 h of high energy milling the Fe(Co) is formed. The obtained Fe(Co) solid solution is characterized by body centered cubic structure with a lattice parameter a = 0.28564 ± 0.00004 nm and an ellipsoidal crystallite and microstrain field. The dissolution of cobalt in iron matrix is accompanied by the compression of the crystalline lattice by 0.37%. The progress of milling process produces an increase of the Debye-Waller factor and the dislocation density leading to the hardening of the powder. The variation of microhardness with milling time shows a change in hardening mechanisms

Financial support from MICYT MAT2006-13925-C02-02 (FEDER) and DURSI 2005SGR-00201 projects is acknowledged

Elsevier

Manager: Ministerio de Educación y Ciencia (Espanya)
Generalitat de Catalunya. Agència de Gestió d’Ajuts Universitaris i de Recerca
Author: Laala-Bouali, H.
Bentayeb, F. Z.
Louidi, S.
Guo, X.
Tria, S.
Suñol Martínez, Joan Josep
Escoda i Acero, Ma. Lluïsa
Abstract: This work deals with the microstructural properties of the Fe-30Co alloy prepared by ball milling of elemental iron and cobalt powders. The obtained mixed powder has been characterized by means of scanning electron microscope, X-ray microanalysis, laser diffraction, X-ray diffraction and microhardness measurements. X-ray line profile analysis based on the Rietveld method and adopting two different models has been used for the microstructural study. The refinement of the X-ray patterns shows that after 3 h of high energy milling the Fe(Co) is formed. The obtained Fe(Co) solid solution is characterized by body centered cubic structure with a lattice parameter a = 0.28564 ± 0.00004 nm and an ellipsoidal crystallite and microstrain field. The dissolution of cobalt in iron matrix is accompanied by the compression of the crystalline lattice by 0.37%. The progress of milling process produces an increase of the Debye-Waller factor and the dislocation density leading to the hardening of the powder. The variation of microhardness with milling time shows a change in hardening mechanisms
Financial support from MICYT MAT2006-13925-C02-02 (FEDER) and DURSI 2005SGR-00201 projects is acknowledged
Document access: http://hdl.handle.net/2072/298085
Language: eng
Publisher: Elsevier
Rights: Tots els drets reservats
Subject: Microscòpia electrònica d’escombratge
Scanning electron microscopy
Microestructura
Microstructure
Materials nanoestructurats -- Propietats mecàniques
Nanostructured materials -- Mechanical properties
Metalls de transició -- Aliatges
Transition metals -- Alloys
Title: X-ray line profile analysis of the ball-milled Fe-30Co alloy
Type: info:eu-repo/semantics/article
Repository: Recercat

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