Morphology of α2 phase in γ-TiAl-base alloy ingots

Selective dissolution of nanolamellar Ti–41 at.% Al alloy single crystals

“…Since the efficiency of these devises increases with decreasing interlayer spacing, very high efficiency may be achieved by utilizing nanoscaled lamellar structures. However, as mentioned above, the selective dissolution of c-lamellae has been applied to only Ti-Al alloys in which c-lamellae were $0.1 lm or larger in width [18,19]. We need to examine whether selective dissolution is applicable to nanolamellar Ti-Al alloys in order to both observe dislocation morphology in nanoscaled a 2 -lamellae and realize nanofin array and nanoslit array structures.…”

“…In previous studies [18,19] techniques to remove only the c-phase have been used in order to investigate the threedimensional configuration of a 2 -lamellae [18] and of dislocation morphologies within a 2 -lamellae [19]. The selective dissolution technique for Ti-Al alloys has only been applied to lamellar structures in which the c-lamellae thickness was >0.1 lm.…”