EBSD and X-ray diffraction study on the recrystallization of cold rolled Ni3Al based intermetallic alloy

Abstract

In the present paper, results of EBSD and X-ray diffraction study on the recrystallization of a cold rolled Ni3Al based intermetallic alloy, are shown. The investigated Zr- and B-doped Ni3Al based intermetallic alloy was subjected to the cold rolling process to 50% of a thickness reduction followed by an 1h annealing at the 700–1100°C temperature range. The EBSD grain orientation spread and grain boundary character distribution analysis allows calculating changes of the fraction recrystallized. A comparison of XRD results and changes of mechanical properties after annealing of the deformed material indicates a key role of the long range order (LRO). The best combination of the strength and ductility is exhibited by the material annealed for 1h at 800°C (TYS∼830MPa, UTS∼1670MPa and elongation close to 25%) which is characterized by a few percent of the fraction recrystallized while its LRO is restored to a significant degree (0.75).