The high temperature mechanical properties and the correlated microstructure/ texture evolutions of a TWIP high entropy alloy

The present work deals with the microstructure and texture evolutions of a TWIP high entropy alloy at various temperatures. Toward this end, tensile tests were conducted temperatures ranging from 298 to 873 K under strain rate 0.001s-1. experimented material exhibited an extraordinary room temperature hardening behavior, in respect both instantaneous exponent values. This resulted acceptable ultimate strength /ductility balance was justified considering activity twinning planar slip. Such capacity deteriorated higher due increasing dislocation annihilation stacking fault energy values that suppressed twin formation accumulation. However, decrease amplitude extent region insignificant compared other single-phase alloys. attributed for storage deformation serrated flow observed 773 dynamic aging (DSA) mechanism. Interestingly, case, DSA mechanism has beneficial effect on overall ductility, which increase result delay necking. Texture examination also reveals double fiber simultaneous contribution octahedral