Archives of Metallurgy and Materials

Institute of Metallurgy and Materials Science of Polish Academy of Sciences
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Microstructural Evolution of AlCuFeMnTi-0.75Si High Entropy Alloy Processed by Mechanical Alloying and Spark Plasma Sintering

  • Minsu Kim (Ajou University, Department of Materials Science and Engineering and Department of Energy Systems Research) ;
  • Ashutosh Sharma (Ajou University, Department of Materials Science and Engineering and Department of Energy Systems Research) ;
  • Myoung Jin Chae (Ajou University, Department of Materials Science and Engineering and Department of Energy Systems Research) ;
  • Hansung Lee (Ajou University, Department of Materials Science and Engineering and Department of Energy Systems Research) ;
  • Byungmin Ahn (Ajou University, Department of Materials Science and Engineering and Department of Energy Systems Research)
  • Published : 20210000
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Abstract

In this work, we have designed a new high entropy alloy containing lightweight elements, e.g., Al, Fe, Mn, Ti, Cu, Si by high energy ball milling and spark plasma sintering. The composition of Si was kept at 0.75 at% in this study. The results showed that the produced AlCuFeMnTiSi0.75 high entropy alloy was BCC structured. The evolution of BCC1 and BCC2 phases was observed with increasing the milling time up to 60 h. The spark plasma sintering treatment of milled compacts from 650-950℃ showed the phase separation of BCC into BCC1 and BCC2. The density and strength of these developed high entropy alloys (95-98%, and 1000 HV) improved with milling time and were maximum at 850℃ sintering temperature. The current work demonstrated desirable possibilities of Al-Si based high entropy alloys for substitution of traditional cast components at intermediate temperature applications.

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Acknowledgement

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2021R1A2C1005478).