Deformation Zone Geometry and Texture Gradients in Cold‐Rolled Niobium

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Abstract
Several niobium plates were cold-rolled at room temperature to a total reduction of 60% maintaining the geometry of the zone of deformation constant for each plate. Pole figures were obtained by means of the Schulz x-ray reflection technique from various depths in the thickness direction for plates rolled with different , the ratio of the mean height of the deformation zone to its contact length. Severe texture gradients were noted and characterized for 1; a modified texture different from the normal texture was observed at intermediate through-the-thickness locations. Both lateral widening and microhardness gradients were also in evidence for this case. No previously proposed theoretical explanation could account for these results.

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