%0 journal article
%@ 1359-6462
%A Zhang, W., Shen, J., Oliveira, J.P., Kooi, B.J., Pei, Y.

%D 2023
%J Scripta Materialia

%P 115049 
%R doi:10.1016/j.scriptamat.2022.115049
%T Crystallographic orientation-dependent deformation characteristics of additive manufactured interstitial-strengthened high entropy alloys
%U https://doi.org/10.1016/j.scriptamat.2022.115049
 
%X In this study, laser powder bed fusion (LPBF) was used for the fabrication of an interstitial-strengthened high entropy alloy (iHEA), Fe49.5Mn30Co10Cr10C0.5 (at.%). The as-fabricated iHEA possesses excellent strength-ductility synergy during tensile loading, with fracture strength reaching up to 1109 MPa at 37% engineering strain. Electron backscatter diffraction (EBSD) and high energy synchrotron X-ray diffraction were used to evaluate the microstructural characteristics of the material. In-situ EBSD analysis during uniaxial tensile testing was performed to unveil the deformation mechanisms. Moreover, crystallographic orientation-specific micropillar compression tests were conducted to determine how the grain deformation characteristics differ between orientations. Due to the activation of multiple slip systems and the homogeneous plastic flow, the [111] orientation demonstrated a higher yield strength and continuous work hardening rate. This research helps in clarifying grain orientation-specific contributions to the bulk mechanical response of additively manufactured HEA.