Texture analyses in titanium aluminide alloys by neutron diffraction.

Thermal neutrons were used to investigate the texture of intermetallic Ti[sub 47]A1[sub 49](Cr, Nb, Mn, Si, B)[sub 4] and Ti[sub 45]A1[sub 45]Nb[sub 10] alloys. The aim was to learn about the influence of different extrusion temperatures and annealing treatments. A relatively strong ingot texture was weakened by extrusion, independently of the processing temperature (1250-1380 °C). However, subsequent annealing has no remarkable influence on the texture sharpness. Therefore, texture has only a minor influence on the anisotropy of hotworked materials. A comparison of the two TiA1 alloys shows a pseudo-cubic deformation behavior for Ti[sub 45]A1[sub 45]Nb[sub 10], which results in a 'double-fiber' < 101] < 110] texture. This pseudo-cubic behavior indicates a high potential of Ti[sub 45]A1[sub 45]Nb[sub 10] for plain strain deformation with sufficient ductility at ambient temperature. [ABSTRACT FROM AUTHOR]