Scientific journal
Scientific Review. Technical science
ISSN 2500-0799
ПИ №ФС77-57440

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DISTINCTIONS OF FRACTURE OF WELDED JOINTS PRODUCED BY FRICTION STIR WELDING AT STATIC TENSION

Zaikina A.A. 1, 2 Levihina A.V. 1, 2
1 Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences
2 National Research Tomsk Polytechnic University
Samples fraction peculiarities of friction stir welds in aluminium magnesium alloys under tension have been studied. It has been shown, that welded joint contains aluminium oxides, locating in the surface of two sample parts fit. This defect cause crack to run from the root along the fit surface. Further fraction comes through basic material of welded joint. Such joint fracture mechanism is associated with its forming mechanism. At bottom part the weld is less strong due to low metal mixing. It is caused by high heat rejection to the base. In the joint core schistose structure had an influence on the fracture behaviour. At the top part the joint is the strongest and sampling break comes through rotation pin and shoulders formed part.