Strength–Ductility Synergy in High Entropy Alloys by Tuning the Thermo‑Mechanical Process Parameters: A Comprehensive Review

Abstract

The strength–ductility trade-off is an eminent factor in decid‑
ing the mechanical performance of a material with regard to specifc
applications. The strength–ductility synergy is generally inadequate
in as-synthesized high entropy alloys (HEAs); however, it can be tai‑
lored owing to its tunable microstructure and phase stability. Thermomechanical processing (TMP) allows the microstructure to be tailored to
achieve desired strength–ductility combination. The additional attribute
is evolution of texture, which also signifcantly infuences the mechanical
properties. This review presents a critical insight into the role of TMP to
achieve superior strength–ductility symbiosis at room temperature in sin‑
gle-phase (FCC, BCC) and multiphase HEA. The role of overall process‑
ing strategy of HEAs encompassing rolling and subsequent annealing in
relation to the evolution of microstructure and texture in have been dis‑
cussed. Recently practiced severe plastic deformation processes have
also shown promise in improving the strength–ductility combination.
The relevance of these processes in the processing of HEAs has also
been analysed. At the end, futuristic approaches have been elaborated
to enable effcient as well as hassle-free process towards achieving the
profciency of strength–ductility in HEAs.