Deformation-Induced Phase Transformations

Abstract

Phase transformations are significant phenomena determining the final properties of a wide range of materials. [...]

Evolution of Face-Centered Cubic Ti Alloys Transformation by X-ray Diffraction Profile Analysis in Mechanical Alloying

“…This value was due to the plastic deformation [91][92][93] suffered by the hcp crystal structure [62,94]. For the β-Ti phase at time less than 15 h, low values of <ε 2 > 1/2 were observed; this effect could be associated with: (i) transformation induced by deformation from α-Ti to β-Ti and (ii) the stability of the β-Ti phase, furthering the reduction of the microstrain [31][32][33][34]95,96]. At 30 h, for the Ti-13Ta and Ti-13Ta-6Sn alloys, the <ε 2 > 1/2 reaches a maximum value of β-Ti compared with the Ti-13Ta-6Mn and Ti-30Nb-6Sn alloys; see Figure 8b.…”

“…In all synthesis processes, two common characteristics have been reported to obtain the γ-phase: (i) nanocrystalline grain size and (ii) high deformation. This indicates that transformations of Ti could be induced by deformation during milling [24,[28][29][30][31][32]. The strains could promote a crystal structure transformation, which is called transformation induced by deformation [31][32][33][34].…”

“…This indicates that transformations of Ti could be induced by deformation during milling [24,[28][29][30][31][32]. The strains could promote a crystal structure transformation, which is called transformation induced by deformation [31][32][33][34]. Ali et al [34] studied the strain-induced phase transformation conducted in Ti-6246 alloy, revealing that deformation at temperatures below the β-transus plays a significant role in the β to α phase transformation kinetics.…”