Evolution of microstructure and mechanical properties during annealing of heavily rolled AlCoCrFeNi2.1 eutectic high-entropy alloy

Changes in the microstructure and mechanical properties during annealing at 800 °C have been characterized a 90% cold-rolled AlCoCrFeNi 2.1 eutectic high-entropy alloy containing FCC B2 (ordered BCC) phases. In as-rolled condition, phase is found to contain high frequency of finely spaced deformation-induced boundaries, which provides driving force for recrystallization within this phase. Quantitative analysis electron backscatter diffraction data from annealed samples indicates that progresses faster than regions. Although leads substantial coarsening microstructure, average recrystallized grain size remains submicron range even after 2 h °C. Tensile test demonstrate combinations yield strength good ductility are obtained partially produced by 2.5–10 min. However, work-hardening capacity each sample lower sample. Furthermore, least 5 min drop observed soon onset plastic deformation. Analysis behavior several clear correlation between magnitude fraction. The studied work compared with reported previous publications.