Influence of strain on the formation of cold-rolling and grain growth textures of an equiatomic HfZrTiTaNb refractory high entropy alloy

Microstructure and Mechanical Properties Evolution in HfNbTaTiZr Refractory High‐Entropy Alloy During Cold Rolling

“…Later, the same authors observed the formation of shear bands and kink bands during compression of the alloy at different strain rates . However, the evolution of the microstructure and properties of this RHEA during such an industrially important deformation scheme as cold rolling is still an open issue …”

“…[6] Usually, RHEAs demonstrate high strength at elevated temperatures and very low ductility at room temperature. [3,[7][8][9] The HfNbTaTiZr RHEA, however, shows a quite different behavior: this alloy is very ductile at room temperature (both in compression and tension) and can be cold rolled to a high strain (>80% of thickness strain); [10][11][12] at the same time, it softens rapidly with an increase in temperature. [5,10,[13][14][15][16] Both the yield stress and elongation to fracture of this alloy is rather high; however, one of the reported specific features of this RHEA is associated with a very low work-hardening rate during deformation.…”

“…[18] However, the evolution of the microstructure and properties of this RHEA during such an industrially important deformation scheme as cold rolling is still an open issue. [10][11][12] In this study, the microstructure evolution of the HfNbTaTiZr RHEA during cold rolling, as well as mechanical properties of the severely deformed alloy, was thoroughly examined, and a crucial role of deformation kinking in an unusual mechanical behavior (low work hardening) of this alloy was revealed.…”

Mechanical behavior and thermal activation analysis of HfNbTaTiZr body-centered cubic high-entropy alloy during tensile deformation at 77 K

“…The equiatomic HfNbTaTiZr is the most studied BCC -HEA [18][19][20][21][22][23][24][25][26][27] . Juan et al [28] reported that the strength ( > 900 MPa) and ductility ( > 10%) of HfNbTaTiZr increased with decrease of grain size, during tensile deformation at room temperature.…”

Rapid decoloration of azo dye Direct Blue 6 by AlCrFeMn high entropy alloy

“…As a new type of multi-principal-element alloy, HEAs are metastable materials lying far from the equilibrium state, which endows HEAs with many excellent properties that are unachievable in crystalline alloys. [24][25][26] HEAs have received a lot of attention in the material science community in recent decades, but the study of HEAs has focused on the mechanical properties. Z. Y. Lv et al report that AlCoCrTiZn HEA exhibits a prominent efficiency in degrading azo dye Direct Blue 6 (DB6).…”