Ti6Al4V titanium alloy fatigue strength after AM- and machining-based process chains

Ghiotti, Andrea; Bertolini, Rachele; Sorgato, Marco; Campagnolo, Alberto; Savio, Enrico; Bruschi, Stefania

doi:10.1016/j.cirp.2022.04.021

Cited by 6 publications

(2 citation statements)

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“…Machining process alters the surface and near-surface (sub-surface) texture, induces compressive residual stress and facilitates hardening, and the formation of severely deformed microstructure features in MAM-produced samples [84]. The machining of the L-PBF-processed Ti6Al4V samples under flood and cryogenic-cooling environments was recently investigated.…”

Section: Post-processing Treatments Of Ti Alloysmentioning

confidence: 99%

“…The machining of the L-PBF-processed Ti6Al4V samples under flood and cryogenic-cooling environments was recently investigated. The significant cryogenic-induced strain hardening effect caused a distinct bending of the α lamellae, strong microstructural refinement, and the formation of harmonic structure (combination of micro- and nano-structure) [84]. The formation of the harmonic structures (hard structure) was reported to have enhanced the surface integrity and increased the fatigue limit of the Ti6Al4V sample machined under cryogenic cooling compared to the sample subjected to flood cooling [84].…”

Section: Post-processing Treatments Of Ti Alloysmentioning

confidence: 99%

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Post-processing treatments–microstructure–performance interrelationship of metal additive manufactured aerospace alloys: A review

Ojo

Taban

2023

Materials Science and Technology

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The application of Metal Additive Manufacturing (MAM) in the aerospace industry has been gaining attention. The poor surface quality of parts greatly limits the prospects of MAM-produced parts in the aerospace industry as fatigue performance hinges on a good surface finish and homogeneous microstructure. Post-processing treatments are important to improve the surface quality and the overall performance of MAM-produced parts during static and dynamic loadings. This paper provides a review of the current state of post-processing treatment options for MAM-produced parts. The advances in the post-processing treatments of MAM parts to improve fatigue strength, tensile strength, surface integrity and other properties of parts are reviewed. Future research prospects on metal additive manufacturing of aerospace parts are briefly expounded. Abbreviations: AM: Additive Manufacturing; CMT-WAAM: Cold Metal Transfer-Based Wire Arc Additive Manufacturing; CSD: Cold Spray Deposition; DA: Direct Aging; DED: Directed Energy Deposition; E: Elongation; EBAM: Wire-feed Electron Beam Additive Manufacturing; EBAM Electron Beam Additive Manufacturing; EBSD: Electron Back Scattered Diffraction; FRAM: Friction Rolling Additive Manufacturing; FSAM: Friction Stir Additive Manufacturing; FSP: Friction Stir Processing; HFDB: Hybrid Friction Diffusion Bonding; HIP: Hot Isostatic Pressing; HSA Homogenisation + Solution Treatment + Aging; IFSP: Interlayer Friction Stir Processing; IPF: Inverse Pole Figure; KAM: Kernel Average Misorientation; LAM: Laser Additive Manufacturing Process; LENS: Laser Engineered Net Shaping; LDM: Laser Deposition Manufacturing; L-PBF: Laser Powder Bed Fusion; MAM: Metal Additive Manufacturing; MTFS: Multi-track Multi-layer Friction Surfacing; O-WLAM: Wire Oscillating Laser Additive Manufacturing (O-WLAM); S: Solution Treatment; SA: Solution Treatment + aging; TEM: Transmission Electron Microscope; UAM: Ultrasonic Additive Manufacturing; UTS: Ultimate Tensile Strength; WAAM: Wire Arc Additive Manufacturing; YS: Yield Strength

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Section: Post-processing Treatments Of Ti Alloysmentioning

confidence: 99%

Section: Post-processing Treatments Of Ti Alloysmentioning

confidence: 99%