Abstract
Effect of strain rate and temperature on nucleation of dynamic recrystallization (DRX) at triple junctions (TJs) in Fe-32Ni alloy was investigated in compression at the temperature from 1123 to 1323K and at strain rate from 2.0 ×10-5 to 2.0× 10-3 s-1. It was revealed that DRX grains nucleated preferentially at TJs at the strain lower than the peak strain. DRX nucleation at TJs became easier with decreasing strain rate and increasing temperature. More than 80% of DRX grains nucleated at TJs were twins. The mechanism of the preferential DRX nucleation was discussed in relation with the effect of grain boundary misorientation composing TJs and angle between loading axis and sliding grain boundary.
