Ultrafine versus coarse grained Al 5083 alloys: From low-cycle to very-high-cycle fatigue

Article dans une revue avec comité de lecture
Auteur
LI, Meng
959 Laboratoire de mécanique des solides [URA 861 / UMR 6610] [LMS [Poitiers]]
233961 Shanghai Jiao Tong University [Shanghai]
ANCHAL, Goyal
500 Laboratoire des matériaux et structures du génie civil [LMSGC]
DOQUET, Véronique
1167 Laboratoire de Mécanique des Solides [LMS]
COUZINIÉ, Jean-Philippe
24508 Institut de Chimie et des Matériaux Paris-Est [ICMPE]
ccRANC, Nicolas
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]

URI
http://hdl.handle.net/10985/14638
DOI
10.1016/j.ijfatigue.2018.12.004
Date
2019
Journal
International Journal of Fatigue

Résumé

The fatigue performance of coarse and ultrafine-grained (UFG) 5083 Al alloy were compared, from low to very high cycle fatigue. The UFG alloy exhibited cyclic hardening and predominant kinematic hardening. At high plastic strain amplitude (and only in this regime), it showed easier crack initiation and a lower fatigue resistance. Its resistance to HCF was hardly better than that of its coarse grained counterpart until 2.10 6 cycles, but 43% higher in VHCF, until 5.10 8 cycles. Beyond that point, internal crack initiation occurred, and the fatigue resistance of the UFG material decreased, which was explained using Fracture Mechanics.

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PIMM-IJF-LI-2019.pdf
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Fin d'embargo:
2019-06-30
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