INFLUENCE OF PULSED ELECTROMAGNETIC FIELD TREATMENT ON STRESSED AND DEFORMED STATE OF CIRCUMFERENTIAL WELDED JOINTS OF ALUMINUM AMg6 ALLOY

摘要

At present a growing interest in pulsed electromagnetic field treatment technologies is observed to improve the mechanical properties of metals, alloys and welded joints. Based on the pulsed electromagnetic field treatment, effective methods can be developed to optimize the stress-strain state of aluminum alloy products in order to extend their life for the use in aircraft, shipbuilding and other industries. The aim of the work is to study the influence of pulsed electromagnetic field treatment on the stress-strain state of circumferential welded joints of aluminum AMg6 alloy. An original experimental procedure was developed to study the kinetics of the electrodynamic pressure force during treatment of metallic materials with a pulsed electromagnetic field. It is shown that as a result of treatment with a pulsed electromagnetic field in the same conditions, the value of P increased with the use of the screen, which is predetermined by the increase in the active additional volume of the electric conductive medium. It was established that the use of the screen during treatment by a pulsed electromagnetic field helps to reduce the level of residual tensile welding stresses and improve the accuracy of circumferential welded joints.