Thermodynamic modeling of the Ti–Al–Cr ternary system

Thermodynamic assessment of the Cr–Ti and first assessment of the Al–Cr–Ti systems

“…10. It should be noted that there is a substantial difference between the calculations of the present work and that in the work of Chen et al [33].…”

“…According to present calculations, the homogeneity range of the gTi(Al,Cr) 2 phase is substantially reduced at 1423 K, while it is extended from 0 to 40 at.%Al at 33.3 at.%Ti according to Chen et al [33]. The reason for this is that Chen et al [33] made their optimization based on the data of Mabuchi et al [62] and Park et al [32], Fig.…”

“…Table 3 compares the calculated temperatures of the invariant reactions on the liquidus surface with the critical evaluation of Bochvar et al [17], the experimental work of Chen et al [71], and the temperatures calculated using the dataset of Chen et al [33]. The maximum difference between the temperatures of invariant reactions calculated with the present description and those measured experimentally by Chen et al [71] is 39 K. It must be mentioned, however, that the results indicate that the calculated temperature of the invariant reaction liquid þ a / b þ g deviates only 13 K with experimental work of Chen et al [71] whereas the thermodynamic description of Chen et al [33] calculates this reaction to occur at approximately 80 K lower.…”

“…It must be stated, however, Table 3 Invariant reactions with the liquid phase in the AleCreTi system. that although Chen et al [33] attempted to model the homogeneity ranges of the s and a-Al 8 Cr 5 phases, they also could not reproduce the s þ a-Al 8 Cr 5 þ e three phase field at 1273 K.…”

“…The reason for this is that Chen et al [33] made their optimization based on the data of Mabuchi et al [62] and Park et al [32], Fig. 9.…”