Plastic deformation of single crystals of Ti₃Al with D0₁₉structure

Thermomechanical fatigue behaviour of a third generation γ-TiAl intermetallic alloy

“…The barrier strength of the a 2 lamellae apparently depends on their orientation with respect to the loading axis. This has been referred to the glide anisotropy of the a 2 -phase by considering the Schmid factor for [8,9]. The a 2 lamellae provide the highest glide resistance in this orientation.…”

Nanoplastic deformation on Ti–39 at.% Al single crystals for manipulation of every single γ lamella

“…In contrast, only one type of hai dislocation can glide on each f1 1 0 0g prism plane since only one of the three hai-type Burgers vectors is parallel to each prism plane. Basal slip is very coplanar and intense although the Peierls stress is clearly higher than for prismatic glide of the same dislocations [25,27]. Legros et al [36] revealed via their in situ TEM observation that the three types of hai dislocations form glissile networks on basal plane and the slip is confined to the plane, which leads to the very coplanar and intense glide.…”

“…There are three slip systems operating in a 2 -Ti 3 Al: (0 0 0 1)h1 1 2 0i basal slip, the f1 1 0 0gh1 1 2 0i prism slip and f1 1 2 1gh1 1 2 6i pyramidal slip [27]. When only the macroscopic nominal loading axis is considered, the Schmid factors for the three slip systems are 0, 0.5 and 0.42 respectively.…”

Plastic deformation behavior of Ni3(Ti0.7Nb0.3) single crystals with D019 structure

“…Taking the observed slip plane of f2111g into consideration, the Burgers vector of dislocations should be parallel to < 2116 >. The f2111g < 2116 > slip system was previously reported to be operative in some other D0 19 -structured compounds [18][19][20][21]. Since only the dislocations caused by the pyramidal slip contain the c-component in their Burgers vector, they may play an important role to yield the ductility of this compound in its polycrystalline form.…”