Induction melting of gamma-TiAl in CaO crucibles
| Autor: | C. Silva Ribeiro, Fernando Gomes, Joaquim Barbosa |
|---|---|
| Přispěvatelé: | Universidade do Minho |
| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
Materials science
Alloy Crucible Induction furnace 02 engineering and technology engineering.material CaO 01 natural sciences Contamination 0103 physical sciences Materials Chemistry Dissolution Microstructure Casting 010302 applied physics Science & Technology Titanium aluminides based on TiAl Mechanical Engineering Metallurgy Metals and Alloys General Chemistry Melting A. Titanium aluminides based on TiAl 021001 nanoscience & nanotechnology C. Casting Superheating C. Melting Mechanics of Materials Titanium aluminides engineering D. Microstructure Limiting oxygen concentration 0210 nano-technology |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| Popis: | In this work a Ti–48Al alloy was induction melted in a CaO crucible using different superheating temperatures. In the first stage, samples were allowed to cool to room temperature inside the crucibles, in order to simulate a low cooling rate, and in the second stage samples were centrifugally poured into a steel mould, in order to study the effect of the melting operation on the alloy contamination with oxygen. The effect of superheating temperature on the metal-crucible interaction, alloy chemical composition, microstructure and microhardness is evaluated. The CaO crucible was found to be slightly dissolved by the molten alloy and the extent of that dissolution depends on the superheating temperature. A relationship was found between oxygen concentration and microhardness profiles of the a2 þ g microconstituent, from the surface to the inside of samples, which depends on the superheating temperature and cooling rate FCT - Fundaçºão para a Ciência e Tecnologia |
| Databáze: | OpenAIRE |
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