Effect of wheel speed and annealing temperature on microstructure and texture evolution of Ni45Mn36.6In13.4Co5 ribbon

摘要

Ni45Mn36.6In13.4Co5 magnetic shape memory alloy was successfully produced as preferentially textured ribbon by melting spinning with different wheel speed. X-ray diffraction (XRD) and electron back scatter diffraction (EBSD) were used to study structure and texture evolution of these melt-spun ribbons. The thickness of melt-spun ribbon is 42 pm, 65 pm and 30 pm depending on wheel speed of 10 m/s, 15 m/s and 20 m/s, respectively. Density of a fiber texture ((100)//ND) vary with wheel speed changes, and is most intensive in the ribbon with wheel speed of 15 m/s. Grains of the ribbons grow after being annealed at 873 K, 973 K, 1073 K and 1173 K, recrystallization was not observed in ribbons after being annealed at 873 K but occurred in ribbons after being annealed at higher temperatures. The et fiber texture becomes weaker to some extent after annealing at different temperatures, due to new recrystallization texture formed at the process of annealing. (C) 2016 Elsevier Inc. All rights reserved.