Journal
OPTICS AND LASER TECHNOLOGY
Volume 128, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.optlastec.2020.106218
Keywords
Additive manufacturing; Direct Laser Deposition; Electron Back Scattering Diffraction (EBSD); Nickel alloys; Microstructural gradient
Categories
Funding
- Direction General de l'Armement (DGA)
- Region Ile-de-France (SESAME 2004 program)
- CNRS
- Ecole Polytechnique
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Laser Cladding is one of the leading additive manufacturing technologies enabling the repair of metallic components. Their fatigue reliability depends directly on the material microstructure and consequently on the process parameters. This study highlights the influence of the interlayer dwell time on single-track walls for Inconel 718 repaired components. EBSD analyses show that dwell time both reduces grain size and creates a textural stretch of the microstructure. An optimal dwell time between the writing of successive layers can then be introduced to target a specified microstructure gradient at the interface between the original part and the repaired deposit.
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