TY  - EJOUR
AU  - Dhekne, Pushkar
AU  - Prabhu, Nikhil
AU  - Bönisch, Matthias
AU  - Seefeldt, Marc
AU  - Diehl, Martin
AU  - Vanmeensel, Kim
TI  - Deformation mechanisms of L-PBF-processed Ti-6Al-4V investigated using a combined experimental and simulation approach
IS  - arXiv:2508.16367
M1  - PUBDB-2025-03821
M1  - arXiv:2508.16367
PY  - 2025
N1  - cited as arXiv:2508.16367 [cond-mat.mtrl-sci]
AB  - 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.
KW  - Materials Science (cond-mat.mtrl-sci) (Other)
KW  - FOS: Physical sciences (Other)
LB  - PUB:(DE-HGF)25
DO  - DOI:10.3204/PUBDB-2025-03821
UR  - https://bib-pubdb1.desy.de/record/637229
ER  -