Microstructural and texture development in direct laser fabricated IN718

摘要: Abstract Microstructural characterisation was performed for IN718 thin-walled builds, produced using direct laser fabrication (DLF), to understand the influence of variations in deposition path and power on microtexture, grain structures intermetallic particle morphology development. Considerable differences were observed, with high input generating a columnar structure, strong fibre texture along build height, compared mixture fine uniform large grains low near random texture. The different DLF conditions formation Laves δ phase also found be significant, precipitates being larger sample. Carbides present build, but not observed samples regardless path.