Selective Laser Melting of Crack-Free High Density M2 High Speed Steel Parts by Baseplate Preheating

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Additive manufacturing of steels: a review of achievements and challenges (2020, background): “[228] Kempen K, Vrancken B, Buls S, Thijs L, Van Humbeeck J,”
Steels in additive manufacturing: A review of their microstructure and properties (2020, methodology): “By re-melting each layer during the L-PBF process, the as-produced hardness can even reach values as high as 64 HRC [116].”
Defect Formation Mechanisms in Selective Laser Melting: A Review (2017, background): “To solve this problem, pre-heating the substrate and improving the ambient temperature are recommended to reduce the cracks in the SLM fabricated parts [26, 27].”
Tailoring residual stress profile of Selective Laser Melted parts by Laser Shock Peening (2017, background): “These residual stresses may even cause process failure during the building phase [18].”
3D Laser Shock Peening – A new method for the 3D control of residual stresses in Selective Laser Melting (2017, background): “High stresses can even lead to process failure (cracking) during the building phase [21].”