Skip to Main content Skip to Navigation
Journal articles

How does surface integrity of nanostructured surfaces induced by severe plastic deformation influence fatigue behaviors of Al alloys with enhanced precipitation?

Abstract : Effects on fatigue behaviors and microstructures of Surface Mechanical Attrition Treatment (SMAT) before or after precipitation aging have been investigated on two hardenable Al alloys. The aluminum alloy with high notch sensitivity (7075) should not be processed by SMAT as the generated low surface integrity is always detrimental to fatigue performances. On less notch sensitive alloys (2024), SMAT before aging formed smaller and denser precipitates, resulting in a high hardened depth, and microstructures more resistant to residual stress relaxation than after conventional shot-peening. SMAT after aging resulted in a significant improvement of fatigue performance with only subsurface crack nucleation sites.
Document type :
Journal articles
Complete list of metadatas

Cited literature [36 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-02903713
Contributor : Laurent Weiss <>
Submitted on : Tuesday, July 21, 2020 - 2:19:50 PM
Last modification on : Friday, July 24, 2020 - 2:06:36 PM

File

Manuscript_12-06-2020.pdf
Files produced by the author(s)

Identifiers

Citation

Pierre Maurel, Laurent Weiss, Thierry Grosdidier, Philippe Bocher. How does surface integrity of nanostructured surfaces induced by severe plastic deformation influence fatigue behaviors of Al alloys with enhanced precipitation?. International Journal of Fatigue, Elsevier, 2020, 140, pp.105792. ⟨10.1016/j.ijfatigue.2020.105792⟩. ⟨hal-02903713⟩

Share

Metrics

Record views

35

Files downloads

53