Microstructural control during laser powder fusion to create graded microstructure Ni-superalloy components

Internal Stress Evolution and Subsurface Phase Transformation in Titanium Parts Manufactured by Laser Powder Bed Fusion—An In Situ X‐Ray Diffraction Study

“…They observed the formation of martensitic α′ phase for scanning speeds v L ≥ 200 mm s −1 and a laser power of P L = 90 W, and the formation of α phase for a scanning speed v L = 100 mm s −1 . These observations are consistent with the studies by Attar et al [ 27 ] Essentially, the choice of the laser parameters can alter the cooling and solidification rate and, therefore, the resulting microstructure [ 28 ] and phase composition [ 26 ] depending on the processed material.…”

On the constitutive relationship between solidification cells and the fatigue behaviour of IN718 fabricated by laser powder bed fusion

“…Although conventionally processed by either casting or forging depending on the expected loads [3][4][5], IN718 is regarded as a suitable alloy for metal additive manufacturing (AM) thanks to its excellent weldability, which stems from the slow precipitation kinetics of its main strengthening precipitate γ" [2,6,7]. Due to the alloy's wide applicability, its promising weldability and the potential advantages arising from AM processes, several studies have been devoted to the investigation of the solidification microstructures and properties of IN718 fabricated by AM, and in particular by laser powder bed fusion (LPBF) (e.g., [4,[8][9][10][11][12]).…”

Microstructure-magnetic shielding development in additively manufactured Ni-Fe-Mo soft magnet alloy in the as fabricated and post-processed conditions

“…It is worth mentioning that the (111) texture in the 110 and 111 samples has been preserved and sometimes further strengthened after HIP and HT post-processes as seen in Fig. 7, and through calculating the texture coefficient (I200/I111) [36] in Fig. 9.…”