Comparative analysis of cutting methods and their impact on fatigue properties of armor steel

Abstract Armor steel is widely used in various industries due to its exceptional yield strength and hardness. However, the cutting processes employed to shape these materials, such as laser and waterjet cutting, may exert a substantial influence on the fatigue resistance of the end product. Fatigue strength is a critical property in materials science, particularly when it comes to high strength steel. As industries strive for lighter and more efficient structures, the demand for materials with superior fatigue resistance becomes paramount. In this article, it is aimed to investigate the effects of laser and waterjet cutting processes on the fatigue strength of armor steel based on experimental results, highlighting the implications for structural integrity and performance. The samples cut by water jet and laser cutting processes were subjected to fatigue tests with and without anti-buckling apparatus. Fatigue tests were carried out at least four different stress values and S–N diagrams were created for 4 different situations. As a result of this study, it was determined that the fatigue strength of samples obtained by laser cutting method is lower than that of waterjet cutting samples. Additionally, it was observed that the fatigue strength of the samples using anti-buckling apparatus was higher.