%0 Electronic Article
%A Dhekne, Pushkar
%A Prabhu, Nikhil
%A Bönisch, Matthias
%A Seefeldt, Marc
%A Diehl, Martin
%A Vanmeensel, Kim
%T Deformation mechanisms of L-PBF-processed Ti-6Al-4V investigated using a combined experimental and simulation approach
%N arXiv:2508.16367
%M PUBDB-2025-03821
%M arXiv:2508.16367
%D 2025
%Z cited as arXiv:2508.16367 [cond-mat.mtrl-sci]
%X Despite the significant application potential of laser powder bed fusion (L-PBF) processed Ti-6Al-4V components, a detailed understanding of their deformation mechanisms remains limited. This study investigates the deformation behavior of the α^ and α phases in the as-built and heat-treated specimens, respectively, using in-situ high-energy X-ray diffraction (HEXRD) combined with crystal plasticity modeling. Both phases exhibited similar elastic anisotropy, with the highest modulus along {00.2} and the lowest along {10.0}, although the α phase consistently showed higher directional moduli than the α^ phase. Their plastic deformation responses differed markedly: in the as-built α^ phase, slip activation followed the sequence prismatic  basal  pyramidal I  c+a , whereas in the heat-treated α phase, the sequence was basal  prismatic  pyramidal I  c+a . Analyses of full width at half maximum (FWHM) and diffraction peak intensities further supported these observations. Finally, inverse modeling within a crystal plasticity framework was employed to determine slip family-specific critical resolved shear stresses (CRSS), revealing higher CRSS values in the α^ phase for all slip systems except the prismatic family.
%K Materials Science (cond-mat.mtrl-sci) (Other)
%K FOS: Physical sciences (Other)
%F PUB:(DE-HGF)25
%9 Preprint
%R 10.3204/PUBDB-2025-03821
%U https://bib-pubdb1.desy.de/record/637229