INVESTIGADORES
MASSONE Juan Miguel
congresos y reuniones científicas
Título:
Study of Shrinkage Porosity in Spheroidal Graphite Cast Iron
Autor/es:
NICOLÁS E. TENAGLIA; G. RIVERA; ROBERTO E. BOERI; J. M. MASSONE
Reunión:
Congreso; 10th International Symposium on the Science and Processing of Cast Iron ? SPCI10; 2014
Resumen:
This study aims at identifying the relationship
between the shrinkage cavities and the solidification structure in spheroidal
graphite cast iron. Cast samples specially designed to contain shrinkage
cavities were used. The solidification macrostructure was revealed by using the
DAAS method while the solidification microstructure was revealed by using color
etching. At the midsection of the pieces the shrinkage cavities and the
solidification structure were observed jointly. Disperse porosity develops
inside the solidifying austenite grains, in coincidence with the location of
the last to freeze melt. The study showed that the classification of shrinkage
porosity found in literature does not correspond to the ductile iron
solidification model recognized by most of the scientific community. Early
solidification models, and therefore shrinkage formation mechanisms, were
proposed in instances when there was not a thorough knowledge of the morphology
of the solid phases during solidification.
At the present time, defects formation mechanisms can be described with
higher accuracy. Therefore, an updated classification of shrinkage porosity for
spheroidal graphite iron is proposed in this study.