Ga. Salishchev et al., Structure and density of submicrocrystalline titanium produced by severe plastic deformation, NANOSTR MAT, 11(3), 1999, pp. 407-414
Severe plastic deformation at temperatures below 0.4T(m) was used to obtain
submicracrystalline titanium. It was revealed that the mass density of tit
anium with a grain size of 100 nm was decreased by 0,5% compared with coars
e-grained titanium. The decrease in density is not connected with formation
of pores or cracks during intensive deformation. On the basis of structure
study and results of dilatometric measurements and X-ray investigations, t
he changes in density of submicrocrystalline titanium are explained. (C) 19
99 Acta Metallurgica Inc.