Plastic deformation of solid-solution strengthened Hf-Nb-Ta-Ti-Zr body-centered cubic medium/high-entropy alloys

Refractory TaTiNb, TaTiNbZr, and TaTiNbZrX (X = Mo, W) high entropy alloys by combined use of high energy ball milling and spark plasma sintering: Structural characterization, mechanical properties, electrical resistivity, and thermal conductivity

“…from elemental powders and after HEBM, demonstrated an increase (non-linear) in their strength with increasing number of components. Recently, a similar finding was reported for the Hf-Nb-Ta-Ti-Zr RHEAs produced by arc melting followed by thermomechanical processing [42]. In this case, an increase in material strength was attributed to higher solid solution hardening.…”

Cross-kink unpinning controls the medium- to high-temperature strength of body-centered cubic NbTiZr medium-entropy alloy

“…We have estimated the activation volume ( V * ) by performing stress relaxation tests during tensile deformation, to identify these processes. The details of evaluating V * were described in our former article [22] . Fig.…”

Aging behavior of two refractory Ti-Nb-(Hf, Zr)-Al high entropy alloys

“…However, due to the chemical complexity, analytical models for SSS in HEAs were not developed until recently [9,[57][58][59][60]. Here, we have used the Coury-Kaufman-Clark model [9], which has recently been proven accurate for the Hf-Nb-Ta-Ti-Zr RHEAs [61], to calculate SSS for the B2 matrix phase of the Ti 40 Nb 30 Zr 20 Al 10 alloy in the recrystallized condition (the corresponding chemical composition is given in Table 2) and after annealing at 700 for 24 h (Table 4). After converting to HV, the difference between the two values is about 6 HV, which correlates well with the experimental difference of 7 HV.…”