Laser peening and shot peening effects on fatigue life and surface roughness of friction stir welded 7075‐T7351 aluminum
Tóm tắt
The effects of laser peening, shot peening, and a combination of both on the fatigue life of Friction Stir Welds (FSW) was investigated. The fatigue samples consisted of dog bone specimens and the loading was applied in a direction perpendicular to the weld direction. Several laser peening (LP) conditions with different intensities, durations, and peening orders were tested in order to obtain the optimum peening parameters. The surface roughness resulting from various peening techniques was assessed and characterized. The results indicate a significant increase in fatigue life using LP compared to shot peening when tested on their native welded specimens.
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Tài liệu tham khảo
Thomas W. M. Nicholas E. D. Needham J. C. Murch M. G. Temple‐Smith P.andDawes C. J.(October 1995)Friction stir butt welding. Int Patent App PCT/GB92/02203 and GB Patent App 9125978.8 December 1991. US patent No. 5 460317.
Donne C. D. Lima E. Wegener J. Pyzalla A.andBuslaps T.(2001)Investigations on Residual Stresses in Friction Stir Welds.3'rd International Symposium on Friction Stir Welding Kobe Japan .
Biallas G., 2000, Advances in mechanical behaviour plasticity and damage, 115
Magnusson L.andKallman L.(June 2000)Mechanical properties of friction stir welds in thin sheet of aluminium 2024 6013 and 7475.Second International Symposium on FSW Gothenburg Sweden .
Okura I. Naruo M. Vigh L. G. Hagisawa N.andToda H.(2001)Fatigue of aluminum deck fabricated by friction stir welding.Eighth International Conference INALCO.
Banes M. Ranes M. Kluken A. O.andMidling O. T.(1995)Fatigue properties of as‐welded AA6005 and AA6082 aluminum alloys in T1 and T5 temper condition. Trends in Welding Research Proceedings of the 4th International Conference 5–8 June Gatlinburg Tennessee .
Dalle Donne C.andBiallas G.(1998)Fatigue and Fracture performance of friction stir welded 2024‐T3 joints.Proceedings European Conference on Spacecraft Structures Materials and Mechanical Testing Brauschweig Germany 4–6 November.
Russel S. G. Tester M. Nichols E. Cleaver A.andMaynor J.(2001)Static fatigue and crack growth behaviour of friction stir welded 7075‐T6 and 2024‐T3 aluminum alloys. Friction Stir Welding and Processing. The Minerals Metals & Materials Society . pp.93–104.
Dalle Donne C. Biallas G. Ghidini T.andRaimbeaux G.(2000)Effect of weld imperfections and residual stresses on the fatigue crack propagation in friction stir welded joints.Second International Conference on Friction Stir Welding 26–28 June. Gothenburg Sweeden .
Tan Y., Laser shock peening on fatigue crack growth behaviour of aluminum alloy, Fatigue Fract. Eng. Mater., 27, 649, 10.1111/j.1460-2695.2004.00763.x
Gregory J. K., 1996, Surface Performance of Titanium, 217
Bussu G.andIrving P. E.(1999)Fatigue performance of friction stir welded 2024‐T351 aluminium joints.1'st International Symposium on FSW California .