The high-temperature tensile deformation behaviors of the recrystallization annealed Al7(CoNiV)93 medium entropy alloy with a duplex hierarchical microstructure face-centered cubic (fcc) and ordered body-centered L21 Heusler-type grains were investigated. showed remarkably high strength ∼1.1 GPa good ductility ∼17% at 923 K due to strain hardening capacity 60 MPa. At 1073 K, highest fracture el...

Ceramics exhibit macroscopic stressistrain rate relations that should lead to superplastic extension. However, premature fracture is normally encountered, due to the formation and growth of grain-boundary cavities. Thus, cavity nucleation and growth were analyzed in an attempt to identify microstructures and/or strain-rate regimes that would suppress cavity evolution and hence allow superplasti...