Agradecimentos: The authors extend their gratitude to the Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP; project no. 2013-09961-3), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq; project nos. PQ: 306896/2013-3 and TWAS:190088/2014-1) and Coordenação de...

Agradecimentos: The authors extend their gratitude to the Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP; project no. 2013-09961-3), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq; project nos. PQ: 306896/2013-3 and TWAS:190088/2014-1) and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) for providing financial support. They would like to thank the School of Mechanical Engineering at University of Campinas (UNICAMP) and the Microscope Laboratory of Sao Carlos University

The alloy A390 was ultrasonically treated, and the resulting material was referred to as master alloy. The master alloy was added into a non-treated A390 melt over two different levels: 10 and 20% by volume in order to investigate its potency for silicon refinement. Appropriate refinement of primary...

The alloy A390 was ultrasonically treated, and the resulting material was referred to as master alloy. The master alloy was added into a non-treated A390 melt over two different levels: 10 and 20% by volume in order to investigate its potency for silicon refinement. Appropriate refinement of primary silicon crystals is obtained by the addition of master alloy. The addition leads to significant formation of twins and stacking faults where the former produces branching and the latter contributes to growth retard providing ∼10 μm Si primary particles. Minor eutectic Si modification is established by the Si clusters which are provided by the master alloy. By master alloy addition, roundness and aspect ratio of eutectic silicon were enhanced and the tensile properties as well as the wear resistance were improved. The morphological evolution, as well as the mechanisms involved in the primary Si refinement and eutectic modification are defined and discussed

FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP

2013-09961-3

CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ

306896/2013-3; 190088/2014-1

COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES

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