Magnetic and mechanical properties of additively manufactured Alx(CoFeNi) complex concentrated alloys

Varun Chaudhary (1) , Mohan Sai Kiran Nartu (2, 3) , Sriswaroop Dasari (2) , Sai Sree Meenakshi Varahabhatla (2, 3) , Abhishek Sharma (2) , Madhavan Radhakrishnan (2) , Srinivas Aditya Mantri (2, 3) , Stéphane Gorsse (4) , Narendra Dahotre (2, 3) , Raju V. Ramanujan (1) , Rajarshi Banerjee (2, 3)

1 School of Materials Science and Engineering [Singapore]
2 Department of Materials Science and Engineering
3 CAAAM - Center for Agile and Adaptive Manufacturing
4 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

Varying the Al content, strongly influences the microstructure, magnetic and microhardness of additively manufactured Alx(CoFeNi) (x = 0, 10, 30) complex concentrated alloys (CCA). Compared to the single FCC phase of CoFeNi, the hierarchical FCC/L12+BCC/B2 heterostructure of heat treated Al10(CoFeNi) CCA displayed substantially improved saturation magnetization, Curie temperature and microhardness. However, there was no significant change in the properties of heat treated CoFeNi and Al30(CoFeNi) CCA. These findings can be rationalized via thermodynamic modelling of the phase stability. We have demonstrated the feasibility of exploiting additive manufacturing for rapidly screening and developing novel high-performance alloys for next generation rotating electrical machines.

Mots clés: Complex concentrated alloys; Additive manufacturing; Microstructure; Magnetic properties

Domaines: Matériaux

Varun Chaudhary, Mohan Sai Kiran Nartu, Sriswaroop Dasari, Sai Sree Meenakshi Varahabhatla, Abhishek Sharma, et al.. Magnetic and mechanical properties of additively manufactured Alx(CoFeNi) complex concentrated alloys. Scripta Materialia, 2023, 224, 115149 (6 p.). ⟨10.1016/j.scriptamat.2022.115149⟩. ⟨hal-03847770⟩