Experimental and computational analysis of abnormal grain growth

The mechanisms involved in the abnormal grain growth of the iron based oxide dispersion strengthened alloys are analysed in the present work. Its microstructural evolution takes place at high temperatures (0.9T m ) and is characterised by an initial submicrometre size microstructure and a strong <...

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Bibliographic Details
Published inMaterials science and technology Vol. 31; no. 13; pp. 1618 - 1626
Main Authors Pimentel, G., Toda-Caraballo, I., Capdevila, C.
Format Journal Article
LanguageEnglish
Published London, England Taylor & Francis 01.10.2015
SAGE Publications
Subjects
Abnormal grain growth
Evolution
Extended recovery
Grain boundaries
Grain growth
Grains
Microstructure
Molecular dynamics
ODS
Orientation
Surface layer
Texture
Abnormal grain growth
Molecular dynamics
Extended recovery
Texture
ODS
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Summary:The mechanisms involved in the abnormal grain growth of the iron based oxide dispersion strengthened alloys are analysed in the present work. Its microstructural evolution takes place at high temperatures (0.9T m ) and is characterised by an initial submicrometre size microstructure and a strong < 110>|| rolling direction (RD) texture that evolves into a few extremely coarse grains (mm sizes) with < 112>||RD orientation. The analysis of the observed grain boundaries has been completed by molecular dynamics simulations. Microstructure evolution consists of an extended recovery process, followed by an abnormal grain growth stage, consequence of the orientation pinning mechanism and the proximity to a symmetric tilt boundary family between the < 110>||RD and < 112>||RD grains.
Bibliography:ObjectType-Article-1
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ISSN:0267-0836
1743-2847
DOI:10.1179/1743284715Y.0000000079