Analysis of the Behavior of Different Steel Alloys Subjected to Uniaxial Mechanical Fully Reversed Fatigue Tests

The favorable choice of material for structural elements for a specific purpose of use depends on the properties of the material that define its behavior in given conditions. Considering the possibility of the appearance of different types of mechanical failures during work under defined conditions, this paper deals with research on the behavior of materials subjected to uniaxial mechanical fully reversed fatigue tests at room temperature in an air atmosphere. The research refers to structural steel (S235JRC+C /1.0122), alloyed carbon steel (18CrNi8/1.5920) and chromium martensitic stainless steel (X46Cr13/1.4034). The tests were performed in an air atmosphere at room temperature, and the test results are presented in the form of a stress-life ( S-N ) diagrams. The fatigue (endurance) limit (/MPa) obtained for each of the tested materials subjected to a mechanical fully reversed fatigue test, (R = - 1), at room temperature, is as follows (material / fatigue limit): 1.0122/202; 1.5920/285; 1.4034/325. In addition, at room temperature, the parameters such as ultimate tensile strength and yield strength, as well as the level of Charpy impact energy, were determined.