In this, the second of four papers devoted to the isothermal forging of int
ermetallic compounds, the Ti3Al based alloy Superalpha-2 has been deformed
in compression at constant strain rate, over temperature and strain rate ra
nges of 900-1050 degrees C and 0.0003-0.035 s(-1), respectively. Calculatio
n of the material property parameters suggests that this material deforms v
ia dynamic recrystallisation of the B2 phase. Microstructural examination h
as shown that isothermal forging generates non-equilibrium microstructures.
Deformation modelling has been successful in predicting the forging behavi
our. Finally, the possibility of explosive grain growth immediately after f
orging raises questions as to whether the mechanical properties of this mat
erial can usefully be controlled by isothermal forging. MST/4316.