Surface integrity of hybrid CM247LC/Inconel 718 components produced by laser-directed energy deposition

• DOI: 10.1007/s00170-022-09605-2
• Publication Date: 2022-07-13T15:04:09Z
• Authors: Aldi Mehmeti; Prveen Bidare; Stano Imbrogno; David Wimpenny; Khamis Essa; Stefan Dimov
• Keywords: Inconel; Surface Integrity; Deposition

Abstract High-temperature alloys pose significant challenges in additive manufacturing. These materials have unique properties, such as high resistance to mechanical and chemical degradation when exposed temperatures. Furthermore, these are used produce hybrid components with other similar alloys, investigating their surface integrity is critical because any residual stress can lead early stage cracks poor fatigue performance. In this research, a manufacturing approach employed from difficult weld i.e. CM247LC deposited on IN718 through laser based direct energy deposition (L-DED) process. The integrity, properties microstructure of investigated, especially welding/joint areas. Crack-free processing regimes were established deposit while mitigating the negative effects onto Inconel substrate. Especially, thermal gradients managed deliver crack free sections good interface bonding, strength fine microstructure. It important note that achieved without preheating contrasts what reported investigations so far. end-use blisks blades 718 disks (HUB) manufactured then machined within single set-up. results show substrate thickness, machining between layers final heat-treatment play role reducing stresses. Ultimately, be considered new solution for producing also subsequent repair.