On the application of laser shock peening for retardation of surface fatigue cracks in laser beam-welded AA6056
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In: Fatigue and Fracture of Engineering Materials and Structures, Vol. 43, No. 7, 01.07.2020, p. 1500-1513.
Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - On the application of laser shock peening for retardation of surface fatigue cracks in laser beam-welded AA6056
AU - Kashaev, Nikolai
AU - Ushmaev, Dmitrii
AU - Ventzke, Volker
AU - Klusemann, Benjamin
AU - Fomin, Fedor
N1 - The authors would like to thank Mr. Falk Dorn, Mr. Kai Erdmann, Mr. Christian Horstmann, Mr. Stefan Riekehr and Mr. René Dinse from the Helmholtz-Zentrum Geesthacht for their technical support and assistance in the experimental work. Publisher Copyright: © 2020 The Authors. Fatigue & Fracture of Engineering Materials & Structures published by John Wiley & Sons Ltd
PY - 2020/7/1
Y1 - 2020/7/1
N2 - The present study aims to investigate the extent to which the fatigue behaviour of laser beam-welded AA6056-T6 butt joints with an already existing crack can be improved through the application of laser shock peening. Ultrasonic testing was utilized for in situ (nondestructive) measurement of fatigue crack growth during the fatigue test. This procedure allowed the preparation of welded specimens with surface fatigue cracks with a depth of approximately 1.2 mm. The precracked specimens showed a 20% reduction in the fatigue limit compared with specimens without cracks in the as-welded condition. Through the application of laser shock peening on the surfaces of the precracked specimens, it was possible to recover the fatigue life to the level of the specimens tested in the as-welded condition. The results of this study show that laser shock peening is a very promising technique to recover the fatigue life of welded joints with surface cracks, which can be detected by nondestructive testing.
AB - The present study aims to investigate the extent to which the fatigue behaviour of laser beam-welded AA6056-T6 butt joints with an already existing crack can be improved through the application of laser shock peening. Ultrasonic testing was utilized for in situ (nondestructive) measurement of fatigue crack growth during the fatigue test. This procedure allowed the preparation of welded specimens with surface fatigue cracks with a depth of approximately 1.2 mm. The precracked specimens showed a 20% reduction in the fatigue limit compared with specimens without cracks in the as-welded condition. Through the application of laser shock peening on the surfaces of the precracked specimens, it was possible to recover the fatigue life to the level of the specimens tested in the as-welded condition. The results of this study show that laser shock peening is a very promising technique to recover the fatigue life of welded joints with surface cracks, which can be detected by nondestructive testing.
KW - aluminium alloys
KW - fatigue crack
KW - laser beam welding
KW - laser shock peening
KW - residual stress
KW - ultrasonic crack tip diffraction
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=85083058704&partnerID=8YFLogxK
U2 - 10.1111/ffe.13226
DO - 10.1111/ffe.13226
M3 - Journal articles
AN - SCOPUS:85083058704
VL - 43
SP - 1500
EP - 1513
JO - Fatigue and Fracture of Engineering Materials and Structures
JF - Fatigue and Fracture of Engineering Materials and Structures
SN - 8756-758X
IS - 7
ER -