|About this Abstract
||1st World Congress on High Entropy Alloys (HEA 2019)
||High Entropy Alloys 2019
||Effect of Cr Variation on FCC Phase Fraction in AlCoCrxFeNi(x= 0 - 1) High-entropy Alloys Synthesised through Mechanical Alloying and Spark Plasma Sintering
||Rahul Bhattacharya, K. Guruvidyathri, Daniel Fabijanic, B S Murty
|On-Site Speaker (Planned)
The effect of Cr variation on FCC/BCC phase formation AlCoCrxFeNi (x= 0 - 1) is explored in the present work. Cr is known to be a BCC stabilizer and σ-phase former. These phases were reported in AlCoCrFeNi HEA obtained through casting route. We adopted mechanical alloying and spark plasma sintering route, since it suppresses certain complex phases. It is observed that the Cr assists in FCC phase in composition domains up to 0.75 molar ratio. This FCC phase is rich in elements Fe, Co and Cr. Increasing Cr content in the alloy also influences the elemental distribution among the FCC and BCC/B2 phases, which in turn affects the thermal stability, hardness, melting point and oxidation behaviour of these HEAs. In this work, we intend to investigate the underlying thermodynamic explanation for the experimentally observed phase evolution using CALculation of PHAse Diagram (Calphad) studies as well.