Characterization of superplasticity in Ti-5.5Al-1Fe alloys

Microstructural evolution during sintering of the blended elemental Ti–5Al–2.5Fe alloy

“…These results confirm the absence of Fe in the ␣-phase. Similar results showing the absence of Fe in the ␣-phase were reported for Ti-5.5Al-1Fe alloy [15]. Wei et al measured the solubility of Fe in ␣-phase at room temperature (about 334 wt.-ppm) [16].…”

Thermomechanical response of particulate-reinforced powder metallurgy titanium matrix composites—A study using processing map

“…As for the design of PM-TMCs, addition of alloying elements should have the beneficial effect of enhancing the sintering ability and/or improving the mechanical properties. For example, Fe accelerates the sintering process through the formation of a transient eutectic liquid-phase at 1085 • C [6]; Mo increases the strength as well as the creep and oxidation resistance [7]; rare earth elements effectively increase the material ductility by scavenging oxygen from the Ti matrix [8]; and Mo 2 C has high reactivity with titanium alloys and strong stabilization ability of ␤ phase. Therefore, a new composition of Ti-1.5Fe-2.25Mo-0.6Y (wt.%) + 10%Mo 2 C was designed to fabricate PM-TMCs.…”

Superplasticity and Superplastic Diffusion Bonding of a Fine-Grained TiAl Alloy

“…6) The superplastic behavior and deformation mechanisms of various alloys have been extensively studied, [7][8][9][10][11][12][13] and the superplastic behavior of TiAl-based alloys has been demonstrated in the past few years. [14][15][16][17] Significant superplastic flow requires a fine, randomly distributed equiaxed grain microstructure, with grain size in the range of 1-10 mm.…”