EFFECT OF PROCESSING VARIABLES ON TEXTURE AND TEXTURE GRADIENTS IN TANTALUM

The effect of processing variables on the development of texture in commercially processed tantalum for deep drawing applications was investigated. Orientation distribution functions (ODFs) showed that tantalum processed with a deformation zone parameter less than one, after rolling and recrystallization, had a desirable {111}<uvw> fiber texture through the plate thickness and also a fine grain size. For tantalum rolled with a deformation zone parameter greater than one and recrystallized, severe texture gradients formed which influenced the final recrystallized grain size. Orientation distribution function analysis indicated that a strong {001}<110> orientation developed in cross-rolled and recrystallized tantalum. The influence of processing variables on the final recrystallized texture and microstructure is discussed, but the deep drawability of the textured tantalum is not described.