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Abstract
The Al corner of the Al–Ti–Be is calculated using the FACT* EQUILIB computer program and applied in interpreting grain refinement and precipitation behaviour results for AI–0·2Ti–0·2Be (wt-%) alloy. Isothermal sections calculated for the temperature interval 527–727°C show that small additions of Be transform the isothermal peritectic reaction for the Al–Ti binary to a monovariant reaction in which secondary Al crystals are formed over a temperature range, and that Be and Ti restrict severely their mutual solubility in solid Al, precipitating as TiBe12. The effects of Be on the Al–Ti system are consistent with the grain refinement and precipitation enhancement for the Be containing alloys.
MST/1223