Abstract
In this paper, properties of aluminum-magnesium alloys with welded joints are investigated. The joints are produced by the friction stir welding under various conditions. This fact is used for studying the principles and patterns of defect structure development. Mechanical properties are evaluated by static tension tests. The impact of welding process conditions on loading curves and strength properties is analysed. Fracture surface structures for samples with and without welded joints are studied, and results are compared. It is revealed, that differences in deformation behavior and mechanical properties of aluminum-magnesium alloys produced under different welding process conditions are caused by developing of structure defects in a welded joints, mostly, nonuniformities/discontinuities of various types. The obtained results can be used for improvement and development of new welding process conditions for aluminum-magnesium alloys.
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