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Title: Influence of specimen orientation on fatigue crack growth in 7050-T7451 and 2050-T8 aluminium alloys
Author: Jesus, J. S.
Antunes, F. V.
Prates, P.
Branco, R.
Antunes, P. V.
Borrego, L. P.
Neto, D. M.
Keywords: Fatigue crack growth
L-T and S-T orientations
Issue Date: 14-Jul-2022
Publisher: Elsevier
Abstract: The effect of L-T and S-T orientations on FCGR is here in studied in 7050-T7451 and 2050-T8 aluminum alloys. The Low-cycle fatigue tests and hardness measurements have shown that specimen orientation has a minor effect on material plastic hardening. Lower FCG rates are obtained for both materials in the L-T orientation, which can be associated to the resistance at grain boundaries. The larger cyclic plastic zone attained in the L-T direction leads to an increase of the plasticity inducing crack closure. Crack deflection observed for L-T direction also affects the FCGR due to roughness inducing crack closure, longer crack path and lower effective ΔK.
Peer review: yes
DOI: 10.1016/j.ijfatigue.2022.107136
ISSN: 0142-1123
Appears in Collections:TEMA - Artigos
DEM - Artigos
ESTGA - Artigos

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