Fig. 6
From: Predictive multiphase evolution in Al-containing high-entropy alloys

In situ STEM/EDS demonstrate rapid changes in the microstructure between 600 and 700 °C. Representative ADF STEM images and corresponding EDS Maps (Ni, Fe, Cr, and Al) of the Al1.3CoCrCuFeNi microstructure. a Initial room-temperature microstructure shows an Al-Ni-enriched matrix with Cr-Fe-enriched plates. b Heat treatment at 600 °C causes separation of Cr and Fe within the plates. c Heat treatment at 700 °C breaks down the coherent microstructure. The observed microstructures are represented schematically in d room temperature, e 600 °C, and f 700 °C. Scale bars are 500 nm