Effective parameters on the fatigue life of metals processed by powder bed fusion technique: A short review

Additive manufacturing, as a sustainable production technology which provides designers with more freedom, is establishing its place in the modern industry. Among its various processes, powder bed fusion technique is one of the most popular ones due to its high-quality products which have near-net-shape density and relatively acceptable mechanical properties. This trend has brought the mechanical properties of materials processed by this technology into the focus for developing their applicability in a broader range of products and industries. Especially, in automobile, aeronautics, and aerospace industries, mechanical properties of metallic parts have a huge role in their applicability. Although static and tensile properties of metals processed by powder bed fusion have generally reached, or even surpassed in some cases, those of conventional materials, their fatigue performance has yet to achieve that point. Thus, fatigue characteristics of these metals still require to be comprehensively understood. Some of the studies on this topic are discussed in this article to introduce some of the most prominent parameters on the fatigue behaviour of the metals to the reader.