Microstructure and properties of additively manufactured AlCoCr.sub.0.75./sub.Cu.sub.0.5./sub.FeNi multicomponent alloy: controlling magnetic properties by laser powder bed fusion via spinodal decomposition

0561684 - FZÚ 2023 RIV CH eng J - Journal Article
Yang, X. - Heczko, Oleg - Lehtonen, J. - Bjoerkstrand, R. - Salmi, M. - Uhlenwinkel, V. - Ge, Y.L. - Hannula, S.-P.
Microstructure and properties of additively manufactured AlCoCr_0.75Cu_0.5FeNi multicomponent alloy: controlling magnetic properties by laser powder bed fusion via spinodal decomposition.
Materials. Roč. 15, č. 5 (2022), č. článku 1801. E-ISSN 1996-1944
Institutional support: RVO:68378271
Keywords : high-entropy alloys * laser powder bed fusion * selective laser melting * direct metal laser sintering * spinodal decomposition * magnetic properties
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.4, year: 2022
Method of publishing: Open access

A non-equiatomic AlCoCr0.75Cu0.5FeNi alloy has been identified as a potential high strength alloy, whose microstructure and consequently properties can be widely varied. In this research, the phase structure, hardness, and magnetic properties of AlCoCr0.75Cu0.5FeNi alloy fabricated by laser powder bed fusion (LPBF) are investigated. The results demonstrate that laser power, scanning speed, and volumetric energy density (VED) contribute to different aspects in the formation of microstructure thus introducing alterations in the properties. Despite the different input parameters studied, all the as-built specimens exhibit the body-centered cubic (BCC) phase structure, with the homogeneous elemental distribution at the micron scale. A microhardness of up to 604.6 6.8 HV0.05 is achieved owing to the rapidly solidified microstructure. Soft magnetic behavior is determined in all as-printed samples.

Permanent Link: https://hdl.handle.net/11104/0334200