The effect of strain on dynamic recrystallization of PM Ti–45Al–10Nb intermetallics during isothermal forging

• The microstructure after isothermal forging was investigated.
• The microstructure was inhomogeneous due to the degree of DRX.
• Large strain and triaxial compressive stress will promote DRX.
• Flow localization was not developed during the forging.

The strain in different regions of the pancake was different during isothermal forging process. Different strain could greatly influenced the forged microstructure. In the present work, the relationships between strain, dynamic recrystallization (DRX) and microstructure in different regions of powder metallurgy Ti–45Al–10Nb alloy during isothermal forging were investigated. The results show that the microstructure from the center to edge of the forged pancake was inhomogeneous due to the degree of DRX. And DRX was related with the degree of strain, large strain can promote DRX.