info:eu-repo/semantics/article
Influence of alloy element distributions on austempered ductile irons
Fecha
2018-11Registro en:
Boccardo, Adrian Dante; Dardati, Patricia Mónica; Godoy, Luis Augusto; Influence of alloy element distributions on austempered ductile irons; Maney Publishing; Materials Science and Technology; 34; 17; 11-2018; 2153-2165
0267-0836
1743-2847
CONICET Digital
CONICET
Autor
Boccardo, Adrian Dante
Dardati, Patricia Mónica
Godoy, Luis Augusto
Resumen
The influence of alloy element distributions on austempered ductile iron microstructure and austempering treatment was analysed by a cellular automaton model that considers the ausferritic and martensitic transformations. The initial microstructure is modelled as spherical graphite nodules inserted in an austenitic matrix, in which the alloy elements are distributed in a uniform or non-uniform way. The study is performed for different chemical compositions and graphite nodule sizes. Delays in the development of ausferritic transformation are produced by the increment of graphite nodule size and the presence of alloy element microsegregations. Moreover, microsegregation reduces the final volume fraction of ferrite platelets. The predicted retained austenite volume fraction is in good agreement with the experimental measurements reported in the literature.