Severe Plastic Deformation and Phase Transformations in High Entropy Alloys: A Review

This review discusses an area of expertise that is at the intersection three large parts materials science. These are phase transformations, severe plastic deformation (SPD), and high-entropy alloys (HEA). First, SPD makes it possible to determine borders single-phase regions existence a multicomponent solid solution in HEAs. An important feature using these technologies, obtain second-phase nanoparticles included matrix with grain size several tens nanometers. Such have very high specific density internal boundaries. boundaries serve as pathways for accelerated diffusion. As result annealing HEAs subjected SPD, accurately border temperature on diagram HEA. Secondly, itself induces transformations Among decomposition formation second phase, high-pressure phases, amorphization, well spinodal decomposition. Thirdly, during number new (GBs) formed due crystallites refinement. Segregation layers exist GBs. The concentration components GBs differs from bulk solution. GBs, atoms leave form segregation layers. Thus, composition volume also changes. All processes make purposefully influence composition, structure useful properties HEAs, especially medical applications.