An overview of factors affecting high-cycle fatigue of additive manufacturing metals

Recently, additive manufacturing technologies have become very important in the industry as they increase the freedom of design and provide the opportunity to realize very complex shapes in one step. Since the use of additive manufacturing has increased in addition to conventional manufacturing methods, the fatigue behavior of engineering materials such as AlSi10Mg, 316L, Ti6Al4V, and Ti64 produced by different additive manufacturing methods is reviewed. In this article, a detailed literature review is presented by evaluating recent studies on the high-cycle and very high-cycle fatigue behavior of engineering components produced with additive manufacturing technologies. In addition to the positive properties of additive manufacturing metals, fatigue performance is adversely affected due to negative properties such as high porosity, poor surface quality, and tensile residual stresses. In this article, factors affecting fatigue strength and postproduction processes required for the production of fatigue-resistant additive manufacturing parts are explained.