%0 journal article
%@ 2214-8604
%A Antunes, L.H.M.,Hoyos, J.J.,Andrade, T.C.,Sarvezuk, P.W.C.,Wu, L.,Ávila, J.A.,Oliveira, J.P.,Schell, N.,Jardini, A.L.,Žilková, J.,da Silva Farina, P.F.,Abreu, H.F.G.,Béreš, M.

%D 2021
%J Additive Manufacturing
%N 
%P 102100 
%R doi:10.1016/j.addma.2021.102100
%T Deformation-induced martensitic transformation in Co-28Cr-6Mo alloy produced by laser powder bed fusion: Comparison surface vs. bulk
%U https://doi.org/10.1016/j.addma.2021.102100
 
%X The wear resistance of the biomedical low-carbon Co-28Cr-6Mo (wt.-%) alloy is primarily determined by the onset and magnitude of the face-centered cubic to hexagonal close-packed deformation-induced martensitic phase transformation. In metal-on-metal joint bearings, local plastic deformation occurs on the surface and in the subsurface regions. This can cause deformation-assisted structural changes in the material, such as mechanical twinning and/or martensitic transformation. In the present work, we report the structural transition on the surface and bulk of a laser powder bed fusion additively manufactured Co-28Cr-6Mo alloy in response to an externally imposed load. This study was possible using in-situ synchrotron X-ray diffraction at two different energy levels. Our results revealed that from tensile deformation to fracture, the phase transformation kinetics and magnitude were marginally higher on the surface. During transformation, {200}FCC peak broadening was observed in the bulk and this was attributed to stacking fault accumulation.