Mines Saint-Etienne, Université de Lyon, LGF, UMR CNRS 5307, France
Jules L’Hostis
Biography
I am a Postdoctoral researcher at LGF (Mines Saint-Étienne), where I focus on developing cobalt-free high-entropy alloys (HEAs) with interstitial doping and optimizing their fabrication through laser powder bed fusion (L-PBF). Previously, I obtained my PhD at UMET (Centrale Lille) under the supervision of Marie-Noëlle Avettand-Fènoël and Ludovic Thuinet, on the topic of the multiscale characterization and phase-field simulation of microstructural evolution in a martensitic stainless steel fabricated by wire arc additive manufacturing (WAAM).
Conferences
Room |
Date |
Hour |
Subject |
|---|---|---|---|
| Room 8 |
26-03-2026 |
11:35 am – 11:55 am |
46 Microstructure and mechanical properties of a Co-free FeCrNiMn highentropy alloy produced by L-PBF |
Conferences Details
46 Microstructure and mechanical properties of a Co-free FeCrNiMn highentropy alloy produced by L-PBF
This research investigates the microstructure and mechanical properties of a newly developed Co-free austenitic stainless high entropy alloy built by L-PBF and subjected to various post-fabrication heat treatments. The parts exhibit typical microstructural features of L-PBFed austenitic steels, and a fine distribution of nanometric spherical oxides. First results indicate already good mechanical strength in the asbuilt condition compared to the conventional alloy. A lower ductility could be explained by a high dislocation density and/or high residual stresses in the as-built state, which can be mitigated by post-fabrication heat treatments to optimize the microstructure and achieve superior properties.
Keywords: austenitic stainless HEA, L-PBF, microstructural characterization, mechanical properties
