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Information × Registration Number 0223U005138, 0123U103011 , R & D reports Title Study of the effect of residual stresses in the concentrator zones on the fatigue resistance of butt joints of AA2219 aluminum alloy maded by TIG popup.stage_title Head Moltasov Andrii V., Кандидат технічних наук Registration Date 15-12-2023 Organization E. O. Paton Elektric Welding Institute National Academy of scinces of Ukraine popup.description2  Object of research: characteristics of cyclic strength and fatigue life of butt joints of AA2219 aluminum alloy made by arc welding with a non-consumable electrode in shielding gases. Subject of research: the interaction of residual stresses caused by the thermal deformation cycle of arc welding with stresses from external cyclic loading in concentration zones and their influence on the parameters of the fatigue curve of butt joints of aluminum alloy AA2219. The purpose of research: determination of the degree of softening caused by the thermal cycle of arc welding with a non-fusible electrode, butt joints of aluminum alloy AA2219 by measuring the hardness of their different zones; experimental establishment of the regularities of the distribution of residual welding stresses in a plate made of the specified alloy with a butt seam. Research methods: Rockwell hardness (scale B) was measured using ROCKWELL device with a 1/16-inch ball diameter under a load of 600 N; the distribution of residual stresses was determined by the method of electronic speckle interferometry with the help of equipment developed at the PEWI of the NASU. Research results: obtained curve of hardness distribution in different zones of butt joint of aluminum alloy AA2219, made by TIG-welding; graphs of the distribution of longitudinal and transverse residual stresses in the direction across the seam on the front side of the plate from the studied alloy were constructed; it is justified that the resulting graphs can also be used to determine the stresses on the root side of this plate. Product Description popup.authors Dyman Marianna M. Moltasov Andrii V. popup.nrat_date 2023-12-15 Close