Predicting the Formation of Intermetallic Phases in the Al-Si-Fe System with Mn Additions

Autor(es)

Otani, Lucas Barcelos ; Soyama, Juliano ; Zepon, Guilherme ; Costa e Silva, Andre ; Kiminami, Claudio Shyinti ; Botta, Walter Jose ; Bolfarini, Claudemiro

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION; v. 38, n. 3, p. 298-304, JUN 2017.
• Citações Web of Science: 6

Resumo

Phase formation was investigated via thermodynamic calculations of the Al-Si-Fe system within the range of commercial compositions with additions of Mn as a quaternary element. The calculations were performed using a commercial aluminum thermodynamic database and were compared with experimental data on sand casting from the literature. Both equilibrium and Scheil-Gulliver models were analyzed. The results showed that by adding Mn to the alloy it was possible to favor the formation of the Chinese script alpha-Al-15(Fe,Mn)(3)Si-2 intermetallic instead of the harmful platelet-shaped beta-Al5SiFe. Furthermore, the calculations indicated that with higher amounts of Mn, the beta-Al5SiFe intermetallic can be formed via a solid-state reaction, while alpha-Al-15(Fe,Mn)(3)Si-2 becomes the primary phase to form from the melt (also known as ``sludge{''} in the aluminum foundry industry). A relationship between Fe and Mn contents was identified that can prevent the formation of the beta-Al5SiFe intermetallic. (AU)

• Processo FAPESP: 13/05987-8 - Processamento e caracterização de ligas metálicas amorfas, metaestáveis e nano-estruturadas
• Beneficiário: Claudio Shyinti Kiminami
• Modalidade de apoio: Auxílio à Pesquisa - Temático