Tailoring elastic admissible strain of TiZr alloy by cold rolling deformation

Effect of thermomechanical treatment on the mechanical and microstructural evolution of a β-type Ti-40.7Zr–24.8Nb alloy

“…It is worth noting that TZN-D exhibited the highest elastic admissible strain among all the TZN alloy samples and its value of δ = 1.47% was considerably higher than those of the as-cast alloy (δ = 1.08%) [12], CP-Ti (δ = 0.47%) [40] and Ti–6Al–4V (δ = 0.80%) [39]. It is possible to obtain structural and functional Ti alloys with excellent mechanical performance via severe plastic deformation [13,14,21,38,47,48]. In this study, TZN-D after cold rolling at an 86% reduction ratio exhibited a yield strength of 1061 MPa, a tensile strength of 1158 MPa, a Young's modulus of 72 GPa, and an ultrahigh elastic admissible strain of 1.47%.…”

Effects of strain and electropulse duration on elastic modulus of TiNi alloy

“…The decrease in incipient E can mainly be attributed to the volume fraction increase of martensitic B19 ′ phase induced by high-density pulse current at pulse duration of 100 µs as presented in Figure 2(d,e) and Figure 3. Moreover, the abundant phase boundaries may also contribute to the low incipient E due to the loose structure caused by the adjacent atoms deviating from its equilibrium state at phase boundaries [7,9,10]. Nevertheless, with the pulse duration further increased to 120 µs, the slight increase in incipient E is owing to the volume fraction decrease of martensitic B19 ′ phase and dynamic recovery of dislocations induced by high-density pulse current.…”

“…In order to obtain an ultralow elastic modulus, great efforts have been made on phase tailoring with different strategies, e.g. composition design, heat treatment and plastic deformation [4][5][6][7]9]. In addition to phase composition, it is reported that dislocation and grain boundary also have a great effect on the elastic modulus via introducing a disordered region in materials [7,[10][11][12].…”