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| Home > Publications database > Deformation mechanisms of L-PBF-processed Ti-6Al-4V investigated using a combined experimental and simulation approach |
| Preprint | PUBDB-2025-03821 |
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2025
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Please use a persistent id in citations: doi:10.3204/PUBDB-2025-03821
Report No.: arXiv:2508.16367
Abstract: 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^\prime} 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^\prime} phase. Their plastic deformation responses differed markedly: in the as-built {α^\prime} phase, slip activation followed the sequence prismatic \rightarrow basal \rightarrow pyramidal I \langle c+a \rangle, whereas in the heat-treated α phase, the sequence was basal \rightarrow prismatic \rightarrow pyramidal I \langle c+a \rangle. 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^\prime} phase for all slip systems except the prismatic family.
Keyword(s): Materials Science (cond-mat.mtrl-sci) ; FOS: Physical sciences
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