Effect of annealing temperature on the transformation temperature and texture of Ni 47Ti 44Nb 9 cold-rolled plate

Transformation behaviors and texture of Ni47Ti44Nb9 cold-rolled plates were studied by differential scanning calorimetry and X-ray diffiaction test. R phase transformation does not occur in Ni47Ti44Nb9 cold-rolled plate annealed at 350 degrees C-750 degrees C followed by quenching into the water. Martensite transformation temperature first increases and then decreases with increment of annealing temperature, and the maximum achieves at 700 degrees C. The heat of reverse martensite transformation increases, while hardness decreases as annealing temperature increases. The major texture of cold-rolled plate is {332}< 110 > and spread from {332} < 110 > to {110} < 110 >. When the annealing temperature is above 600 C, the major textures are {332}< 113 > and {111}< 112 > recrystallization texture in secondary cold-rolled plate.