A Study of Progressive Milling Technology on Surface Topography and Fatigue Properties of the High Strength Aluminum Alloy 7475-T7351

0500896 - ÚJF 2019 RIV US eng C - Conference Paper (international conference)
Piska, M. - Ohnistova, P. - Horníková, J. - Hervoches, Charles
A Study of Progressive Milling Technology on Surface Topography and Fatigue Properties of the High Strength Aluminum Alloy 7475-T7351.
International Conference on New Trends in Fatigue and Fracture. New York: Springer, 2018, s. 7-17. ISBN 978-3-319-70364-0.
[17th International Conference on New Trends in Fatigue and Fracture (NT2F17). Cancun (MX), 25.10.2017-27.10.2017]
R&D Projects: GA MŠMT LM2015056
Institutional support: RVO:61389005
Keywords : fatigue properties * aluminium alloy * residual stress * neutron diffraction
OECD category: Aerospace engineering

The hard complex inclusions Fe-Cu-C-O were crucial for disturbing the material integrity and production of local stress risers and suppressed the role of surface roughness or selection of cutting conditions in the analyzed ranks. Neither the surface topography nor the imposed specific cutting energies were the key factors affecting the fatigue performance of the machined aluminum alloy 7475-T7351. Fatigue fracture analysis showed that the material inclusions dispersed in the adherent machined surfaces trigger the fatigue crack initiations and propagations. The next research is focused on the analysis of the mechanism in direct SEM tensile test observations and elimination of the material inhomogeneities.
Permanent Link: http://hdl.handle.net/11104/0292939