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Communication Dans Un Congrès Année : 2014

Influence of intermetallic particles on shot fatigue crack initiation in AA2050-T8 and AA7050-T7451

Résumé

Fatigue crack initiation at particles is studied in hot rolled 2050-T8 and 7050-T7451 material, using 1 to 4 mm cross section specimens. Both size and aspect ratio of particles are observed to affect their probability of being damaged. In 2050-T8 material, the probability that a matrix crack initiate at a cracked particle increases with its size, and no effect of aspect ratio is observed. In 2050-T8 specimens, matrix cracks initiate at both precracked (Al, Cu, Fe, Mn) particles and particles cracked during cycling. Initiation in 7050-T74 specimens occur on Mg2Si particles which may be cracked or debonded, and Al7Cu2Fe particles that are cracked during cyclic loading.
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Dates et versions

hal-01814317 , version 1 (01-08-2018)

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Erembert Nizery, Jean-Yves Buffiere, Henry Proudhon, Armelle Danielou, Samuel Forest. Influence of intermetallic particles on shot fatigue crack initiation in AA2050-T8 and AA7050-T7451. FDMD II - JIP 2014 - Fatigue design & material defects, Jun 2014, Paris, France. pp.07003, ⟨10.1051/matecconf/20141207003⟩. ⟨hal-01814317⟩
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