[2] A. Dass and A. Moridi "State of the Art in Directed Energy Deposition: From Additive Manufacturing to Materials Design" Coatings (2019) 9, 418.
[3] T. Ron, O. Dolev, A. Leon, A. Shirizly and E. Aghion 2021 "Effect of phase transformation on stress corrosion behavior of additively manufactured austenitic stainless steel produced by directed energy deposition" Materials (2021) 14 (1), 55.
[4] O. Dolev, T. Ron, E. Aghion and A. Shirizly "Effect of HIP Defects on the Mechanical Properties of Additive Manufactured Ti6Al4V Alloy" Metals (2022) 12, 1210.
[5] M. Bassis, T. Ron, A. Leon, A. Kotliar, R. Kotliar, A. Shirizly and E. Aghion, "The Influence of Intralayer Porosity and Phase Transition on Corrosion Fatigue of Additively Manufactured 316L Stainless Steel Obtained by Direct Energy Deposition Process" Materials (2022) 15, 5481.
[6] K.A. Cashell and N.R. Baddoo "Ferritic stainless steels in structural applications" Thin-Walled Structures 83, (2014) 169–181."/>

2025 - Sustainable Industrial Processing Summit
SIPS2025 Volume 9. Intl. Symp on Advanced Materials, Biomaterials, Manufacturing and Quasi-Crystals

Editors:F. Kongoli, F. Marquis, N. Chikhradze, T. Prikhna, M. Bechelany, H. Oudadesse, K. Pramanik, R. Das, E. Suhir
Publisher:Flogen Star OUTREACH
Publication Year:2025
Pages:282 pages
ISBN:978-1-998384-54-9 (CD)
ISSN:2291-1227 (Metals and Materials Processing in a Clean Environment Series)
CD-SIPS2025_Volume1
CD shopping page

    THE EFFECT OF PRINTING DEFECTS ON FUNCTIONAL PROPERTIES OF ADDITIVELY MANUFACTURED (AM) AUSTENITIC STAINLESS STEELS

    Eli Aghion1;
    1BEN-GURION UNIVERSITY OF THE NEGEV, Tel Aviv, Israel;
    Type of Paper: Regular
    Id Paper: 115
    Topic: 43

    Abstract:

    Printing defects produced during additive manufacturing (AM) processes can have a significant detrimental effect on functional properties. This mainly relates to their influence on mechanical properties and corrosion performance. The present study aims to evaluate the effect of printing defects created during AM using direct energy deposition (DED) process. The raw material selected for this examination was 316L stainless steel in the form of welding wires. The printing defects were examined by micro-tomography (CT) analysis while the microstructure assessment was carried out using optical and scanning electron microscopy along with X-ray diffraction analysis. The mechanical properties were examined in terms of tensile strength, hardness measurements and fatigue endurance. The corrosion performance was tested by potentiodynamic polarization analysis, while stress corrosion resistance was examined by means of slow strain rate testing (SSRT). The results obtained emphasize the relatively reduced mechanical properties, fatigue endurance, corrosion resistance and stress corrosion performance of the AM alloy compared to its counterpart wrought alloy AISI 316L produced by conventional processes. This was mainly attributed to typical AM printing defects such as porosity and lack of fusion as well as dissimilarities in terms of phase compositions. The pure austenitic structure of the conventional wrought alloy was converted to duplex microstructure that encountered an austenitic matrix and a secondary delta-ferrite phase in the AM alloy which have a detrimental effect on the inherent passivity.      

    Keywords:

    Additive manufacturing; 316L stainless steel; direct energy deposition; stress corrosion, fatigue; Fracture and fatigue

    Cite this article as:

    Aghion E. (2024). THE EFFECT OF PRINTING DEFECTS ON FUNCTIONAL PROPERTIES OF ADDITIVELY MANUFACTURED (AM) AUSTENITIC STAINLESS STEELS. In F. Kongoli, F. Marquis, N. Chikhradze, T. Prikhna, M. Bechelany, H. Oudadesse, K. Pramanik, R. Das, E. Suhir (Eds.), Sustainable Industrial Processing Summit Volume 9 Intl. Symp on Advanced Materials, Biomaterials, Manufacturing and Quasi-Crystals (pp. 227-228). Montreal, Canada: FLOGEN Star Outreach