Abstract
This paper presents the chemical and phase composition, microstructure, and selected properties both at room temperature and at the temperature corresponding to the expected operating conditions of three successive generations of TiAl-based alloys (Ti-47Al-2W-0.5Si, Ti-45Al-8Nb-0.5(B,C), and Ti-45Al-5Nb-2Cr-1Mo-0.5(B,C)-0.2Si) melted in a vacuum induction furnace with high-density isostatic pressed graphite crucibles. The obtained results of mechanical and physical properties of the produced alloys were compared to the properties of reference alloys with similar chemical composition and melted in a cold copper crucible furnace. The effect of increased carbon content in the produced alloys due to the degradation of the graphite crucible during melting is higher strength properties, lower plastic properties, higher coefficient of thermal expansion, and improved creep resistance. It was shown that the proposed technology could be successfully used in the production of different generation TiAl-based intermetallic alloys.
| Original language | English |
|---|---|
| Article number | 669 |
| Journal | Metals |
| Volume | 11 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Apr 2021 |
Keywords
- Graphite crucibles
- Induction melting
- Mechanical properties
- Microstructure
- TiAl-based alloys
ASJC Scopus subject areas
- General Materials Science
- Metals and Alloys
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