Effect of strain on evolution of dynamic recrystallization in Nb-1 wt%Zr-0.1 wt%C alloy at 1500 and 1600 °C

Uniaxial compression tests were carried out on Nb-1 wt%Zr-0.1 we%C alloy at temperature of 1500 and 1600 degrees C and strain rate of 0.1 s(-1) to study the evolution of dynamic recrystallization with strain. Electron back scatter diffraction was used to quantify the microstructural evolution. Nb-1Zr-0.1C alloy showed a necklace structure at a strain of 0.9 when deformed at 1500 degrees C and at strain of 0.6 when deformed at 1600 degrees C, both at strain rate of 0.1 s(-1). This suggested the occurrence of dynamic recrystallization. At 1500 degrees C and strain of 0.9 the local average misorientation and the grain orientation spread was low confirming the presence of dynamic recrystallization at this deformation condition. At both 1500 and 1600 degrees C and all measured strains the recrystallized grains had a strong fiber component of < 001 >. (C) 2017 Elsevier Inc All rights reserved.