Speaker
Description
Laser Powder bed fusion (L-PBF) has attracted a lot of interest in recent years, not only for its profound advantage of producing metallic components of complex geometries but also for the possibility of manipulating microstructures and crystallographic textures. Additionally, recent observations on wrought austenitic steels have revealed the strong dependence of the transformation induced plasticity (TRIP) effect in metastable stainless steels on the crystallographic texture. [1]–[3] Taking the aforementioned observations into consideration we employed a 304L steel, processed by L-PBF, in order to produce differently textured specimens. Uniaxial tension and compression tests, paired with in-situ neutron diffraction, enabled the monitoring of the microstructural evolution during deformation. The present study highlights how different microstructures, produced by L-PBF, lead to different deformation behavior in austenitic stainless steels and paves the way for tailored microstructures in different types of steels and for studies under different loading conditions.
Bibliography
[1] E. Polatidis et al., “The interplay between deformation mechanisms in austenitic 304 steel during uniaxial and equibiaxial loading,” 2019, doi: 10.1016/j.msea.2019.138222.
[2] E. Polatidis et al., “Suppressed martensitic transformation under biaxial loading in low stacking fault energy metastable austenitic steels,” Scr. Mater., vol. 147, pp. 27–32, Apr. 2018, doi: 10.1016/j.scriptamat.2017.12.026.
[3] E. Polatidis, J. Čapek, A. Arabi-Hashemi, C. Leinenbach, and M. Strobl, “High ductility and transformation-induced-plasticity in metastable stainless steel processed by selective laser melting with low power,” Scr. Mater., vol. 176, pp. 53–57, Feb. 2020, doi: 10.1016/j.scriptamat.2019.09.035.
| Speaker Country | Switzerland |
|---|