Fatigue behavior in Inconel alloys produced by 3D printing: A short review
DOI:
https://doi.org/10.62676/jdaf.2025.3.1.20Keywords:
Superalloy, Inconel, Additive manufacturing, Fatigue, Heat treatment, Post-processingAbstract
Inconel alloys, especially IN625 and IN718, are widely used in the aerospace and energy industries due to their high temperature and corrosion resistance. With the development of additive manufacturing (AM) methods, it has become possible to produce complex parts from these alloys, such as gas turbine blade. However, the fatigue behavior of these parts is affected by several factors that require careful investigation. This paper investigates the effect of manufacturing method, microstructure, heat treatment, and surface irregularities on the fatigue behavior of Inconel alloys produced by 3D printing. The results indicated that heat treatment has a great impact on microstructure, including the size, texture, grain mode, and precipitates. Loading path and temperature influence the fatigue crack propagation mechanism. Hot isostatic pressing (HIP) significantly influences the fatigue of AMed parts by improving eliminating residual stresses, surface finish, increasing hardness and decreasing porosity, inclusions, and microcracks. This is mainly related to partial recrystallization and dissolution of hard phases. Various types of surface treatment also improves the fatigue behavior by producing nanostructured surface layer and the high compressive residual stress (CRS).
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