RT Journal Article
T1 Effect of Y2O3 addition on the microstructure and mechanical properties of an Al1.8CoCrCu0.5FeNi BCC HEA
A1 Reverte, Eduardo
A1 Keller, Clément
A1 Calvo Dahlborg, Monique
A1 Alcalá Penadés, Germán
A1 Campos, Mónica
A1 Cornide Arce, Juan
AB The present study investigated the influence of Y2O3 addition by mechanical alloying (MA) on the microstructure evolution of a BCC High Entropy Alloy (HEA). The characterisation and mechanical properties of the alloy were explored using X-ray diffraction, SEM, EBSD, and nano-indentation. The sintered Al1.8CoCrCu0.5FeNi HEA shows a microstructure formed by an ordered BCC phase (Al-rich) and a second disordered BCC (Cr-rich), while a minor FCC (Cu-rich) appears. These BCC phases show a wide morphology evolution from cuboidal and wave-like structures to irregular shapes. The minor FCC phase also adopts several morphologies as the MA is performed. The introduction of oxide reinforcements and microstructure refinement through mechanical alloying yields a change in phase quantification and grain structure. In accordance with the hardness and elastic modulus values from ordered/disordered BCC phases, the disordered BCC shows higher values than the ordered one. The grain size reduction as well as the solid solution strengthening from the microstructure evolution consequence of the MA are shown to be the main contributors to the increase in hardness and elastic modulus in the consolidated samples.
PB ELSEVIER SCIENCE SA
YR 2023
FD 2023-10
LK https://hdl.handle.net/20.500.14352/126447
UL https://hdl.handle.net/20.500.14352/126447
LA eng
NO Eduardo Reverte, Clément Keller, Monique Calvo-Dahlborg, Germán Alcalá, Mónica Campos, Juan Cornide, Effect of Y2O3 addition on the microstructure and mechanical properties of an Al1.8CoCrCu0.5FeNi BCC HEA, Journal of Alloys and Compounds, Volume 960, 2023, 170647, ISSN 0925-8388, https://doi.org/10.1016/j.jallcom.2023.170647.
NO Regional Government of Madrid
NO Spanish Ministry of Science, Innovation and Universities
NO Universidad Carlos III de Madrid
DS Docta Complutense
RD 19 mar 2026