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- Title
ESTUDO SOBRE A NUCLEAÇÃO E CRESCIMENTO DE NÓDULOS DE GRAFITA EM FERROS FUNDIDOS NODULARES.
- Authors
de Albuquerque Vicente, André; Bridi Telles, Victor; Barbosa Botelho Junior, Amilton; Giampietri Lebrão, Susana Marraccini; Romano Espinosa, Denise Crocce; Soares Tenório, Jorge Alberto
- Abstract
Three commercial ductile cast iron heats were studied. The same base metal and nodularization alloy were used. Each of the heats was made with different inoculants. The weight percentage of inoculant and nodularization alloy were respectively 1.0% and 1.3%. The nucleation and growth of the nodular graphite particles were studied. Several complementary techniques for microstructural analysis were used, such as optical microscopy, scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). It was observed the growth sequence of spheroid nodular graphite particles, demonstrating the formation of complex silicates rich in aluminium, calcium and barium around the core, creating a supportive interface to the heterogeneous solidification of graphite from these particles larger than the critical radius.
- Subjects
NODULAR iron; DISCONTINUOUS precipitation; MICROSCOPY; SCANNING electron microscopy; X-ray spectroscopy; BARIUM
- Publication
Tecnologia em Metalurgia, Materiais e Mineração, 2019, Vol 16, Issue 3, p299
- ISSN
2176-1515
- Publication type
Article
- DOI
10.4322/2176-1523.20191624