| Abstract Scope |
The extraordinary mechanical performance of high-entropy alloys (HEAs) stems from their ability to activate multiple deformation mechanisms either concurrently or in sequence. With the growing interest in additive manufacturing, 3D-prinitng of HEAs has emerged as a promising route for fabricating geometrically complex parts. Notably, 3D-printed HEAs exhibit a distinct hierarchical microstructure, markedly different from their conventionally processed counterparts, comprising large columnar grains, melt pools, and fine cellular dislocation networks. These microstructural features significantly influence mechanical behavior. While extensive studies have explored deformation mechanisms in conventionally fabricated HEAs, investigations into their additively manufactured equivalents remain limited. In this study, EBSD was employed to analyze the deformation characteristics of a CrMnFeCoNi HEA produced via laser-beam powder bed fusion. Under monotonic loading, multiple active deformation mechanisms including lattice rotation, deformation twinning, and FCC-to-HCP phase transformation are revealed in the as-built alloy. Details from this work will be presented at the upcoming conference. |