Susceptibility to atmospheric stress corrosion cracking of laser-based powder bed fusion 316LShow others and affiliations
2025 (English)In: Journal of Materials Research and Technology, ISSN 2238-7854, E-ISSN 2214-0697, Vol. 39, p. 8577-8590Article in journal (Refereed) Published
Abstract [en]
This work aims to assess the susceptibility to stress corrosion cracking (SCC) of additively manufactured (AM) 316L stainless steel by laser-based power bed fusion (PBF-LB) and compare its performance with conventional manufacturing (CM), i.e. wrought 316L. Also, the influence of different surface conditions was analyzed. Potentiodynamic polarization tests in artificial seawater were used to obtain electrochemical properties, such as pitting breakdown potential (E<inf>bd</inf>) and corrosion potential (E<inf>corr</inf>). Stress corrosion cracking susceptibility was measured using U-Bend specimens, using concentrated artificial seawater droplets, simulating non-rinsing atmospheric conditions in marine environments. The specimens were exposed to temperatures between 40 and 60 °C and relative humidity of 40 %. For the AM specimens, two surface conditions were tested: as built and after machining process. A higher threshold temperature was observed for 316L-AM, indicating a better SCC resistance, than the 316L-CM, hence L-PBF can be used as an alternative manufacturing route for replacing 316L-CM as better properties were achieved. X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and superficial residual stress measurements were used to aid the discussion of the SCC results. These tests revealed better passive layer properties in the AM material and formation of strain-induced martensite in the CM after bending, leading to higher residual stress
Place, publisher, year, edition, pages
Elsevier, 2025. Vol. 39, p. 8577-8590
Keywords [en]
316L, Atmospheric corrosion, Passive layer, PBF-LB, Stress corrosion cracking
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:ri:diva-79962DOI: 10.1016/j.jmrt.2025.11.114Scopus ID: 2-s2.0-105022886644OAI: oai:DiVA.org:ri-79962DiVA, id: diva2:2020498
Funder
EU, Horizon Europe, 101119767
Note
This project has received funding from Horizon Europe 's research and innovation program under the Marie Sklodowska-Curie grant agreement no. 101119767 (DurAMat Project). We also acknowledge Kitty Baert from the MACH department of the Vrije Universiteit Brussel (VUB) for her contribution in the acquisition of the XPS spectra.
2025-12-102025-12-102025-12-10Bibliographically approved