Improvement of Fatigue Behaviour of High Strength Aluminium Alloys by Fluidized Bed Peening (FBP) |
| Journal |
Key Engineering Materials (Volume 344) |
| Volume |
Sheet Metal 2007 |
| Edited by |
F. Micari, M. Geiger, J. Duflou, B. Shirvani, R. Clarke, R. Di Lorenzo and L. Fratini |
| Pages |
87-96 |
| DOI |
10.4028/www.scientific.net/KEM.344.87 |
| Online since |
July, 2007 |
| Authors |
M. Barletta,
F. Lambiase,
Vincenzo Tagliaferri
|
| Keywords |
Fatigue, Fluidized Bed Peening(FBP), High Strength Aluminium Alloy |
| Abstract |
This paper deals with a definition of a relatively novel technique to improve the fatigue
behavior of high strength aluminum alloys, namely, Fluidized Bed Peening (FBP). Fatigue samples
made from AA 6082 T6 alloy were chosen according to ASTM regulation about rotating bending
fatigue test and, subsequently, treated by varying FBP operational parameters and fatigue testing
conditions. First, a full factorial experimental plan was performed to assess the trend of number of
cycles to rupture of fatigue samples varying among several experimental levels the factors peening
time and maximum amplitude of alternating stress applied to fatigue samples during rotating
bending fatigue tests. Second, design of experiment (DOE) technique was used to analyze the
influence of FBP operational parameters on fatigue life of AA 6082 T6 alloy. Finally, ruptures of
FB treated samples and untreated samples were discussed in order to evaluate the influence of
operational parameters on the effectiveness of FBP process and to understand the leading process
mechanisms. At any rate, the fatigue behavior of processed components was found to be
significantly improved, thereby proving the suitability of FBP process as alternative mechanical
technique to enhance fatigue life of components made from high strength aluminum alloy. |
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