The numerical simulation of the post-welding stress-strain state of thin-sheets welded joints of EP718 alloy

Authors:
Medvedev A.Yu. Medvedev A.E. Shaikhulova A.F. Nikiforov R.V. Murugova O.V. Galimov V.R.
Abstract:

The paper presents the development of a numerical thermal deformation model of two-pass pulsed arc GMA (Gas Metal Arc) welding of a thin-sheet welded joint made of EP718 alloy using the ANSYS package, considering the distribution of temperature fields from a consumable electrode during transverse vibrations. Experimental verification of the calculation results showed that the developed thermal deformation model of two-pass GMA welding makes it possible to predict the stress-strain state of a thin-sheet welded joint with an error of 10 %, sufficient for engineering calculations. Residual stresses von Mises after welding according in the weld does not exceed 840 MPa (0.8 σB). The thermal deformation model of two-pass GMA pulsed arc welding developed during research can be used to assess the stress-strain state of a welded structure of complex spatial geometry with a large number of welds.