STUDY BY EXPERIMENT OF THE ZONE OF FRACTURE ON S355JR STEEL SPECIMENS WITH CORROSION

The fracture zone is characterized by two peculiarities. The first of these is the fact that it begins after the tensile strength has been reached and the neck has begun. The second feature in this area is that rupture occurs sharply (instantly) and there is no significant deformation. It is known that corrosion has a serious impact on steel ductility, geometric characteristics, structural changes and surface defects. Its influence should not be neglected and should be investigated, especially when corrosion is an accidental destruction of the steel due to the influence of various aggressive factors. This is a perfectly natural process. We investigate the change in this area by using S355JR steel subjected to an electrochemical accelerated corrosion method. We have 3 groups with varying degrees of corrosion, which groups we experienced on tension test. We took the values of the fracture zone of the stress-strain curve, processed through the stochastic way and so we got the final results. We did a micro study and found that there were deformations in the corrosion section, which gave us reason to conclude that corrosion layer accepted stress/strain.