The effect of post weld heat treatment on S355J2N structure steel and investigation with destructive non-destructive inspection methods

Welding applications use as assembly method in the current ındustry. Gas arc welding (GMAW /GTAW) are the most preferred methods from arc welding methods. Heat input to the material would during the welding. Therefore, residual stress occurs especially on area under the influence of heat with heat changes. Also, this situation affects unfavourable mechanical properties and relative strength of material. Residual stress aren't prevent but the effect can be reduced substantially with post weld heat treatment. In this thesis; Effect of residual stress after welding on mechanical properties were inspected with destructive and non-destructive methods in structural steel S355J2N. Effect of Post weld heat treatment was detected with destructive methods. Mechanical properties were compared and published result with tables at before post weld heat treatment and after post weld heat treatment. By comparing those tables, it has been found that welding application decreases the resistance properties of the material by creating residual stress. Consequently; it has been found that the effects of residual stresses are removed a certain rate by post weld heat treatment and the material is strengthened with destructive and non-destructive methods.