Microstructural and defects investigation of AlCrFeMnNi-based high entropy alloy fabricated via laser powder bed fusion

[en] Abstract. Al0.15CrFe2.9Mn1.7Ni2.1Mo0.2 high entropy alloy (HEA) powder’s mixture was prepared manually by blending 316L stainless steel with elemental powders. The mixture was processed through Laser Powder Bed Fusion (LPBF) to achieve a face-centered cubic (FCC) structure, aiming to enhance corrosion resistance. Since the powders used were not designed for LPBF, this study investigates the effects of powder characteristics and scanning strategies on the resulting microstructure with a focus on the defects assessment. After optimizing the processing parameter window through single tracks printing, the scanning strategy is selected while varying laser power, scanning speed and remelting step. Microstructure analysis of the printed samples was conducted by combining Optical Microscopy (OM) and Scanning Electron Microscopy (SEM). The analysis revealed the presence of hot cracks and unmelted agglomerates of refractory elements, and other compositional heterogeneities in all the samples. The findings provide a basis for developing optimized printing strategies and producing defects-free printed samples.

Disciplines :

Materials science & engineering

Author, co-author :

Seidou, Abdul Herrim ; Université de Liège - ULiège > Aérospatiale et Mécanique (A&M)

Blondiau, Catherine

Dedry, Olivier ; Université de Liège - ULiège > Aérospatiale et Mécanique (A&M)

Tchuindjang, Jérôme Tchoufack ; Université de Liège - ULiège > Aérospatiale et Mécanique (A&M)

Mertens, Anne ; Université de Liège - ULiège > Aérospatiale et Mécanique (A&M)

Language :

English

Title :

Microstructural and defects investigation of AlCrFeMnNi-based high entropy alloy fabricated via laser powder bed fusion

Publication date :

2025

Event name :

European Scientific Association on Material Forming 2025

Event place :

Paestum, Italy

Event date :

07/05/2025-09/05/2025

Audience :

International

Journal title :

Materials Research Proceedings

ISSN :

2474-3941

eISSN :

2474-395X

Publisher :

Materials Research Forums, Millersville, United States - Pennsylvania

Volume :

Pages :

159-169

Peer review/Selection committee :

Peer Reviewed verified by ORBi

Available on ORBi :

since 19 May 2025

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