Abstract
In a β-stabilized Ti-43Al-4Nb-1Mo-0.1B alloy (composition in atomic percent) the correlation between the occurrence of β-phase and temperature was analyzed experimentally and compared to thermodynamic calculations. Results from in situ high-energy X-ray diffraction, texture measurements, heat treatments, scanning electron microscopy, and temperature-dependent flow stress measurements were used to study the evolution of the β-phase with temperature. Thermodynamic calculations based on the CALPHAD method were applied to correlate the phases developed in the β-solidifying TiAl based alloy under investigation. This alloy is characterized by an adjustable β-phase volume fraction at temperatures where hot-work processes such as forging and rolling are conducted. Due to a high volume fraction of β-phase at elevated temperatures the hot-extruded alloy can be forged under near conventional conditions.
Original language | English |
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Pages (from-to) | 827-833 |
Number of pages | 7 |
Journal | Intermetallics |
Volume | 16 |
Issue number | 6 |
DOIs | |
State | Published - Jun 2008 |
Externally published | Yes |
Keywords
- A. Titanium aluminides, based on TiAl
- B. Alloy design
- B. phase identification
- B. texture
- E. Phase diagram, prediction