Tailoring cold spray additive manufacturing of steel 316 L for static and cyclic load-bearing applications

0542735 - ÚFP 2022 RIV NL eng J - Článek v odborném periodiku
Bagherifard, S. - Kondás, J. - Monti, S. - Čížek, Jan - Perego, F. - Kovařík, O. - Lukáč, František - Gaertner, F. - Guagliano, M.
Tailoring cold spray additive manufacturing of steel 316 L for static and cyclic load-bearing applications.
Materials and Design. Roč. 203, May (2021), č. článku 109575. ISSN 0264-1275. E-ISSN 1873-4197
Grant CEP: GA MŠMT EF16_019/0000778
Institucionální podpora: RVO:61389021
Klíčová slova: 3D-printing * Crack propagation * Fatigue * Freestanding * Kinetic deposition
Obor OECD: Materials engineering
Impakt faktor: 9.417, rok: 2021
Způsob publikování: Open access
https://www.sciencedirect.com/science/article/pii/S0264127521001283?via%3Dihub

Thanks to the low working temperature, less product size limitations and one order of magnitude higher deposition rates compared to the established additive manufacturing techniques, more attention has been brought to the potential of cold spraying for additive manufacturing. As a process dealing with deformation of solid particles possibly leaving non-bonded interfaces and causing work hardening, any optimization should (i) adjust spray parameters to obtain high performance as-sprayed parts and (ii) tune ductility and internal stresses by post-treatments. The present study first deals with strategies to optimize spray parameters for fabrication of high performance steel 316 L deposits. Next, the performances of deposits are further adjusted by various heat treatments. The structural strength of the freestanding samples before and after the heat treatments is evaluated under static and cyclic axial loading and supported by fatigue crack growth rate analysis. The results highlight the feasibility of obtaining high quality steel 316 L deposits using N as process gas, rather than the costly He that is commonly suggested. This study demonstrates the potential of cold spraying to be used for deposition of freeform structural components with a static strength comparable to that of bulk and laser-based additive manufactured materials and a fatigue strength similar to that of bulk cast material. 2
Trvalý link: http://hdl.handle.net/11104/0320093