Study investigates how aluminum and nickel affect the mechanical properties of high-entropy alloys, suggesting important implications for material design.
This study investigates the influence of Al and Ni content on the phase evolution, mechanical behavior, and fracture morphology of CoCrFe-based high-entropy alloys (HEAs). Quasi-static compression and dynamic impact tests were conducted to evaluate the sensitivity of these alloys to varying strain rates. X-ray diffraction (XRD) and metallographic analyses indicate that AlCoCrFeNi2.1 exhibits a single-phase FCC structure and Al1.2CoCrFeNi1.9 possesses a dual-phase FCC/BCC structure. Al1.4CoCrFeNi1.7 transitions to a fully BCC structure, confirming that increasing Al content stabilizes the BCC phase.
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Lin et al. (2026) studied this question.
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