Laser Powder Bed Fabrication of Nickel‐Base Superalloys: Influence of Parameters; Characterisation, Quantification and Mitigation of Cracking

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Additive manufacturing of metallic components – Process, structure and properties (2018, background): “Second, liquation cracking [209] is observed in the mushy zone or partially melted zone (PMZ) of the build [210].”
Fractal scan strategies for selective laser melting of ‘unweldable’ nickel superalloys (2017, background): “[14] for CM247LC, has been shown to close micro-cracks.”
Process defects and in situ monitoring methods in metal powder bed fusion: a review (2017, unknown): “…2013; Casavola et al., 2008; Zah and Lutzmann, 2010; Zaeh and Branner, 2010; Kempen et al., 2013; Kruth et al., 2004; Carter et al., 2012 - 2014 Carter et al., 2012 - 2014; Arisoy et al., 2016; Niu and Chang, 1999; Huang et al., 2016; Thijs et al., 2010; Scharowsky et al., 2015; Puebla et al.,…”
Current Status and Perspectives on Wire and Arc Additive Manufacturing (WAAM) (2019, unknown): “Upon solidification, Ni-based alloys may exhibit the following: solidification cracking [56], liquation cracking [57], ductility-dip cracking [58], and strain-age cracking [59].”
Process optimisation of selective laser melting using energy density model for nickel based superalloys (2016, methodology): “Previous works presented by Carter et al.(5,6) have examined process optimisation of SLM for high c9 volume fraction alloys and associated microstructural inhomogeneity induced by the laser scanning strategy.”