Evaluation of the effect of various types of tools on a weld joint during wave strain hardening

Abstract

Abstract The article studies the problem of increasing the durability of weld joints using surface plastic deformation by the method of wave strain hardening (WSH). Earlier, WSH was not used for these purposes. The prospect of using WSH for increasing the durability of weld joints is associated with the possibility of increasing the microhardness and the formation of compressive residual stresses at a depth of more than 10 mm. To identify the most effective conditions for the use of various types of tools for WSH of weld joints and accelerate the search for rational modes and conditions of WSH, finite element modeling was used. As a result of the research, recommendations related to the use of various types of WSH tools, depending on the thickness of weld joints, changes in hardness and stress state of the near-weld zone after welding, were given.