Fatigue crack growth characterization of Inconel 718 after additive manufacturing by laser powder bed fusion and heat treatment

0562906 - ÚFM 2024 RIV GB eng J - Journal Article
Gruber, K. - Szymczyk-Ziolkowska, P. - Dziuba, S. - Duda, S. - Zielonka, P. - Seitl, Stanislav - Lesiuk, G.
Fatigue crack growth characterization of Inconel 718 after additive manufacturing by laser powder bed fusion and heat treatment.
International Journal of Fatigue. Roč. 166, JAN (2023), č. článku 107287. ISSN 0142-1123. E-ISSN 1879-3452
Institutional support: RVO:68081723
Keywords : Inconel 718 * Laser powder bed fusion * Hot isostatic pressing * Fatigue crack growth rate * Mean stress effect
OECD category: Materials engineering
Impact factor: 6, year: 2022
Method of publishing: Open access
https://www.sciencedirect.com/science/article/pii/S0142112322005370?via%3Dihub

Numerous studies were conducted on the tension-compression fatigue behavior of Inconel 718 (IN718) fabri-cated with laser powder bed fusion (LPBF). Contrary, only a few fatigue crack growth rate (FCGR) studies are available in the literature. Considering the above, LPBF manufactured IN718 is heat treated in variants including (H) and excluding (A) hot isostatic pressing. FCGR tests are performed at stress ratios R = 0.1 and R = 0.5. Both variants show similar FCGR and fracture modes at both stress ratios, despite a significant difference in ductility. Furthermore, A and H show similar FCGR at R = 0.1 and better performance at R = 0.5 compared to wrought IN718.
Permanent Link: https://hdl.handle.net/11104/0341695