Materials Science Forum, Vol.467-470, 537-542, 2004
Microstructure and texture evolution during static recrystallization of Zr-2Hf alloy
The recrystallization of a Zr-2Hf alloy sheet deformed by plane strain compression at room temperature and then heat treated in the temperature range 500-650degreesC is studied. The microstructure, local and global crystallographic textures are investigated by EBSD and X-ray techniques. The as-deformed condition exhibits a heterogeneous microstructure composed of highly and less deformed zones, the EBSD indexing of the latter ones being more reliable. The as deformed condition displays a (0001) <10 (1) over bar0> crystallographic texture. The evolution of the microstructure during recrystallization very much depends on the amount of local deformation. Recrystallization begins in highly deformed zones, new grains having two variants of texture components, {0001} <10 (1) over bar0> and {0001} <11 (2) over bar0>. Some change of preferred orientations concomitant with grain growth at 600 and 650degreesC has been observed with a decrease in the {0001} <10 (1) over bar0> component and an increase in the {0001} <11 (2) over bar0> component.