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

5

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.

References

Kreitcberg, A., Brailovski, V., Turenne, S., 2017. E ff ect of heat treatment and hot isostatic pressing on the microstructure and mechanical properties of inconel 625 alloy processed by laser powder bed fusion. Materials Science and Engineering: A 689, 1–10. URL: https: //www.sciencedirect.com/science/article/pii/S0921509317301946 , doi: https://doi.org/10.1016/j.msea.2017.02.038 . Marchese, G., Garmendia Colera, X., Calignano, F., Lorusso, M., Biamino, S., Minetola, P., Manfredi, D., 2017. Characterization and comparison of inconel 625 processed by selective laser melting and laser metal deposition. Advanced Engineering Materials 19, 1600635. URL: https://onlinelibrary.wiley.com/doi/abs/10.1002/adem.201600635 , doi: https://doi.org/10.1002/adem. 201600635 , arXiv:https://onlinelibrary.wiley.com/doi/pdf/10.1002/adem.201600635 . Moradi, M., Hasani, A., Pourmand, Z., Lawrence, J., 2021. Direct laser metal deposition additive manufacturing of inconel 718 superalloy: Statis tical modelling and optimization by design of experiments. Optics Laser Technology 144, 107380. URL: https://www.sciencedirect. com/science/article/pii/S0030399221004680 , doi: https://doi.org/10.1016/j.optlastec.2021.107380 . Nguejio, J., Szmytka, F., Hallais, S., Tanguy, A., Nardone, S., Godino Martinez, M., 2019. Comparison of microstructure features and mechanical properties for additive manufactured and wrought nickel alloys 625. Materials Science and Engineering: A 764, 138214. URL: https: //www.sciencedirect.com/science/article/pii/S0921509319310007 , doi: https://doi.org/10.1016/j.msea.2019.138214 . Son, K.T., Kassner, M.E., Lee, K.A., 2020. The creep behavior of additively manufactured inconel 625. Advanced Engineering Materials 22, 1900543. URL: https://onlinelibrary.wiley.com/doi/abs/10.1002/adem.201900543 , doi: https://doi.org/10.1002/adem. 201900543 , arXiv:https://onlinelibrary.wiley.com/doi/pdf/10.1002/adem.201900543 . Sundararaman, M., Mukhopadhyay, P., Banerjee, S., 1988. Precipitation of the δ -ni3nb phase in two nickel base superalloys. Metallurgical Transactions A 19, 453–465. URL: https://doi.org/10.1007/BF02649259 , doi: 10.1007/BF02649259 . Yang, B., Lai, Y., Yue, X., Wang, D., Zhao, Y., 2020. Parametric optimization of laser additive manufacturing of inconel 625 using taguchi method and grey relational analysis. Scanning 2020, 9176509. URL: https://doi.org/10.1155/2020/9176509 , doi: 10.1155/2020/9176509 . Zafar, F., Emadinia, O., Conceic¸a˜o, J., Vieira, M., Reis, A., 2023. A review on direct laser deposition of inconel 625 and inconel 625-based com positesmdash;challenges and prospects. Metals 13. URL: https://www.mdpi.com/2075-4701/13/4/787 , doi: 10.3390/met13040787 .