Phase equilibria in Ti−Fe−Nb alloys

Phase equilibria of the Fe–Nb–Ti system at 900°C

“…3(c), the equilibrated alloy 3 shows the existence of the two phases TiFe and (Nb, Ti), the equilibrium compositions of which were determined to be Fe 48.8 Nb 1.1 Ti 50.1 and Fe 11.7 Nb 21.9 Ti 66.4 (in at.%), respectively. It was demonstrated that the ternary compound , which was found at 750 and 600 • C by Shurin et al [4], was not observed at 900 • C. Fig. 5(a-c) shows the XRD patterns corresponding to the alloys 2, 4 and 5 listed in Table 2, respectively.…”

“…2(c). For the Shurin et al [4] claimed that a ternary compound with the approximate formula Fe 3 NbTi 6 was observed at 750 and 600 • C. The alloy 3 listed in Table 2 was Table 4 The tie-triangle data on the phase equilibria of the Fe-Nb-Ti system at 900 designed to see if the ternary compound occur at 900 • C. As shown in Fig. 3(c), the equilibrated alloy 3 shows the existence of the two phases TiFe and (Nb, Ti), the equilibrium compositions of which were determined to be Fe 48.8 Nb 1.1 Ti 50.1 and Fe 11.7 Nb 21.9 Ti 66.4 (in at.%), respectively.…”

“…Up to now, very limited information on the phase equilibria of the ternary system is available. Shurin et al [4] investigated the phase equilibria in the Ti-rich corner of the Fe-Nb-Ti system at 750 and 600 • C, and suggested that a ternary compound of unknown structure with the approximate formula Fe 3 NbTi 6 was observed. The present study is intended to investigate the phase equilibria of the Fe-Nb-Ti system at 900 • C.…”

Affordable electrolytic ferrotitanium alloys with marine engineering potentials

“…On the contrary, Nb weakened the alloy and the Vickers hardness number of Sample 11 decreased to 381. Nb has not only a large solubility in Ti, but can also help to dissolve Fe in Ti [32,33]. Therefore, the added 5 wt.% of Nb effectively kept Fe in ␤-Ti and prevented the formation of Fe-Ti intermetallics.…”

The phase equilibrium diagram for the Fe-Nb-Ti System

“…In the region of titanium-rich alloys containing up to 30 at.% Fe and up to 10 at.% Nb, isothermal sections of the ternary Fe − Nb − Ti phase diagram have been constructed for 750, 600, and 450°C [16,17]. In the 750 and 600°C sections there is a broad two-phase <α-Ti + β-Ti> region.…”