TEMPORARY TENSILE STRENGTH OF WELDED STRUCTURES MADE FROM DOMESTIC AND FOREIGN MATERIALS

Abstract

When welding domestic and imported alloys with argonarc welding, unexplored material properties are formed in the weld, there is no information about the mechanical properties of welded joints, their continuity and uniformity. One of the most important criteria for working capacity of any construction is a strength of the whole structure and its individual elements. As a comparative characteristics that evaluates the strength of the materials we use tensile strength, that is, the tension corresponding to the greatest efforts preceding the rupture of the sample under static mechanical tests. Tests to identify the ultimate tensile strength of sheet welded joints were carried out on a universal testing machine Inspekt-50.
In the course of studies there was defined tensile strength of welded constructions, obtained by fusing domestic and imported sheet hire materials. Tensile strength of the welded structure is determined by the characteristics of the least durable material in a pair of connected, which corresponds to conclusions made in the analytical review. When testing it was observed that the destruction of all samples made of combination of dissimilar materials occurred at the base of the weakest metal in the combination. The destruction of the weld was not fixed. The results obtained can be used in the design of welded constructions composed of parts made of domestic and imported materials. However, it is impossible to judge the working capacity of welded pipes of integrated air conditioning and anti-icing aircraft systems by tensile strength only. Subsequently, it is necessary to carry out tests on low-cycle fatigue and assess the strength of the welded ring joints under the action of static and pulsating internal pressure.