Abstract
Inconel 625 (IN625) has an excellent suite of high temperature mechanical properties that encourages its use in fabricating jet engine and gas turbine components. Apart from conventional manufacturing methods, recent advances in laser powder bed fusion (LPBF), a laser-based additive manufacturing method, has enjoyed reasonable success in producing crack-free near net shaped components made of IN625. With the purpose of understanding its applications and limitations, the mechanical behavior of LPBF manufactured IN625 is reviewed in detail. First, the microstructural evolution in the as-built state is discussed. Furthermore, the changes in microstructure with respect to various heat treatments are well explained. Correlations between microstructural dependence and process-induced defects on uniaxial tensile characteristics at ambient and elevated temperatures are highlighted. Similarly, microstructural correlations are made with fracture, fatigue life and creep behaviors of LPBF IN625. Finally, the current research gaps and unfulfilled challenges are summarized to postulate future research directions.
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The funding was funded by Science and Engineering Research Board (Garnt no. SRG/2020/000095).
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Idury, K.S.N.S., Chakkravarthy, V. & Narayan, R.L. Mechanical Behavior of Laser Powder Bed Fusion Processed Inconel 625 Alloy. Trans Indian Natl. Acad. Eng. 6, 975–990 (2021). https://doi.org/10.1007/s41403-021-00269-0
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DOI: https://doi.org/10.1007/s41403-021-00269-0