Evolution mechanism of crystallographic orientation in grain continuator bars of a Ni-based single-crystal superalloy prepared by Bridgman technology during directional solidification

Abstract

Ni-based single-crystal turbine blades have been used extensively in advanced aero-engines and landbased industrial gas turbines due to their excellent mechanical properties and microstructure stability at elevated temperatures, profiting from the elimination of transverse grain boundary defects [1] . Generally, single-crystal turbine blades are prepared by directional