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Additive Manufacturing of Nickel-based Hastelloy X Superalloy by Electron and Laser-based Powder Bed Fusion
thesisposted on 2022-01-06, 06:09 authored by AMAL SHAJI KARAPUZHA
This thesis examines the effect of microstructure on the room and elevated temperature mechanical properties of nickel-based Hastelloy X superalloy manufactured by electron beam powder bed fusion and laser based powder bed fusion process. It identifies the influence of columnar microstructure on the fatigue resistance at elevated temperature, the role of powder bed temperature in carbide precipitation, and also the impact of post-fabrication treatments towards improving the fatigue crack growth behaviour by alleviation of tensile residual stress.