INVESTIGADORES
SCHVEZOV Carlos Enrique
artículos
Título:
An experimentalinvestigationofthecolumnar-to-equiaxedgraintransition in aluminumcopperhypoeutecticandeutecticalloys
Autor/es:
A.E. ARES; S.F.GUEIJMAN; C. E. SCHVEZOV
Revista:
JOURNAL OF CRYSTAL GROWTH
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2010 vol. 312 p. 2154 - 2170
ISSN:
0022-0248
Resumen:
Providingbenchmarkdataofthethermalandmetallographicparametersduringthecolumnar-to-equiaxedtransition(CET)inawiderangeofalloyconcentrationsisoffundamentalimportanceforunderstandingthisphenomenonaswellasformetallurgicalandmodelingpurposes.Theaimofthisstudywastoinvestigatethecolumnar-to-equiaxedtransition(CET)inaluminumcopperalloysofdifferentcompositionscoveringawiderangefrom2to33.2wt%Cu(eutecticcomposition),whichweredirectionallysolidifiedfromachillface.Thethermalparametersstudiedincludedrecalescence,coolingrates, temperaturegradientsandinterphasevelocities.WefoundthatthetemperaturegradientandvelocityoftheliquidusinterphasereachedcriticalvaluesattheCET;thesecriticalvalueswerebetween0.44 and0.09K/mmandbetween0.67and2.16mm/s,respectively.Themetallographicparametersanalyzedweregrainsize,primaryandsecondarydendriticarmspacingandalsoeutecticspacing.Theresults obtainedwerecomparedwithpreviousexperimentalstudies,publishedpredictionsandmodelsof theCETforsimilaralloys.
