PSI - Issue 54
Daniel F.O. Braga et al. / Procedia Structural Integrity 54 (2024) 626–630
630
Daniel F.O. Braga et al. / Structural Integrity Procedia 00 (2023) 000–000
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and7g / min. These parameters were then used to manufacture new specimens which were then tensile tested with the same procedure, resulting in an average UTS of 840.47 MPa and standard deviation of 18.34 MPa, which is within the 95 % prediction level.
4. Conclusions
Inconel 625 was deposited successfully in all process parameter sets studied, with strength and ductility in line with previously reported literature. DIC demonstrated that LMD of Inconel 625 resulted in a high level of anisotropy with very non uniform strain fields in uniaxial testing. These non uniform strain fields culminated if brittle failures regardless of process parameters used. An UTS prediction model was achieved and employed to optimize the manufacturing process towards strength. The specimens manufactured with the optimized process parameter set of 1000 W laser power and 7 g / min powder feed, was within the 95 % prediction level of the model, demonstrating it’s usefulness.
Acknowledgements
The authors acknowledge the project POCI- 01-0247-FEDER-072260, financed by European Funds, through pro gram COMPETE2020, under the Eureka smart label S0318-STREAM -Surface TREatment for Additive Manufactur ing.
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