An investigation of static and dynamic behavior of mechanical components produced by additive manufacturing method

The applications of Additive Manufacturing (AM) and studies on AM are increasing day by day due to the more flexible design opportunity of the AM compared to traditional production methods. Since this feature of the AM allows design engineers to design components with complex geometry and lightweight, it provides a decrease in fuel consumption, an increase in load carrying capacity and a longer flight / transport range. Due to the mentioned advantages, AM is very attractive for aerospace, aviation and automotive industries. Despite the advantages mentioned above, the AM also has some disadvantages. Mechanical parts produced using AM may have residual stresses, unique microstructural properties and possible internal defects that cause the dynamic and static properties of the part to change. Different types of metallic materials can be used in AM according to their properties and application areas. 17-4 PH stainless steel is one of the most preferred metallic materials in engineering applications due to its very high strength and good corrosion resistance at high temperatures up to 315 ° C. Within the scope of the study, vertical tensile and bending fatigue samples were produced from 17-4 PH stainless steel material under argon atmosphere using Selective Laser Melting (SLM) method. Different types of heat treatment were applied to the samples and the effect of heat treatment on static and dynamic behavior was examined. In this context, modal tests of the samples were carried out at room temperature using the impact technique. Then, static tensile tests and bending fatigue tests were performed at room temperature. After the tests were completed, the internal structure of each sample were examined by optical microscope, and hardness values were obtained.