Evolution of hot rolling texture in pure tungsten and lanthanum oxide doped tungsten with various reductions

Abstract

Textures of hot rolled pure tungsten (PW) and W-1.0wt%La2O3 (W-1%La2O3) with various strains were characterized to figure out the effect of rolling reduction and second phase on evolution of hot rolling texture. Initial sintering texture of 〈111〉//ND and {110}〈111〉, {112}〈111〉 slip systems as well as dynamic recovery, dynamic recrystallization facilitated the formation of the θ-fiber and γ-fiber textures for PW and W-1%La2O3 during the hot rolling process. Furthermore, dynamic recovery occurred in 72% rolled PW and 43% rolled W-1%La2O3 led to a significant rise of {001}〈110〉 texture. Besides, dynamic recrystallization occurred in 80% rolled PW and 72% rolled W-1%La2O3 resulted in an enhancement of {001}〈100〉accompanied with a drop of {111}〈112〉texture. The occurrence of dynamic recovery and dynamic recrystallization in W-1%La2O3 was sooner than in PW, which may be caused by more dislocations in total and additional geometrically necessary dislocations as well as local deformation zone induced by adding of La2O3 particles.