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Information × Registration Number 0221U000010, 0119U101262 , R & D reports Title Development of the methodology for the assessment and monitoring of the efficiency of aluminum welded structures of aerospace engineering popup.stage_title Head Rudavskyy Denys V., Доктор технічних наук Registration Date 02-01-2021 Organization Karpenko Physico-Mechanical Institute of NASU popup.description2  It is established that unlike fusion welding, stir friction welding technology provides high strength and fatigue crack resistance of the aluminum D16T alloy sheets joints, which is accompanied by the implementation of a mainly ductile energy-intensive fracture micromechanism of the all joint zones. As a result, the characteristics of fatigue crack growth resistance for the weld metal are significantly exceeded, and for the zones of thermomechanical and thermal effects are at the level set for the base metal. Peculiarities of the acoustic emission parameters, in particular, signal intensity, average values of amplitude and number of signals, their frequency range, at different stages of fatigue fracture near stress concentrator in samples of aluminum D16chat alloy are reviled. It is found that the value of energy parameter of acoustic emission changes of 4-5 times during the accumulation of the microplastic deformations and microcrack system origin until the formation of the initial macrocrack and its growth. Product Description popup.authors Velykyy Petro P Dolinska Iryna Ya. Kaniuk Yurii I. Ostash Orest P. Rudavskyy Denys V. Stankevych Olena M. Tolopko Yaroslav D. Chepilʹ Roman V. Shapovalov Gеorgij О. popup.nrat_date 2021-01-02 Close