X-RAY SUBSTRUCTURE-ANALYSIS IN COLD-ROLLED TITANIUM

Substructure development in cold-rolled alpha-titanium was investigate d by X-ray diffraction line-broadening using a methodology which takes into account the texture formation of the material. The formation of defect structures is different for various grain orientations and give s rise to significant substructure-texture correlation already at lowe r deformation degrees. The main reason for the line-broadening and sub structure differences, respectively, observed in the texture component s is obviously the orientation dependence of mechanical twinning. TEM and EBSP investigations have shown that at lower deformation degrees t hree different twinning systems are activated. (C) 1997 Elsevier Scien ce S.A.