316L-Si Austenitic Stainless Steel Elaborated by Additive Manufacturing Process: Porosity and Dislocation Density Estimation

Abstract:

This investigation estimated porosity and dislocation density in austenitic stainless steel 316LSi thin walls fabricated by Cold Metal Transfer Wire and Arc Additive Manufacturing (CMT-WAAM). Porosity density was calculated using ImageJ software. MAUD software (Materials Analysis Using Diffraction) was used to analyze the microstructural parameters and dislocation density. The density of pores and microstructural parameters of 316LSi alloy exhibit typical values of AM conditions. The porosity values oscillate between 2.80 to 3.48 %. The obtained dislocation density values are 5.0 e+12, 4.3 e+12, and 3.2 e+12 for 2.4 e+12 m^-2 for 70, 80, 90, and 140 A current source, respectively. In 316LSi thin walls, the increases in the current input in CMT-WAAM are accompanied by the very lowest decrease in the dislocation density state.

• Periodical: Key Engineering Materials (Volume 964)
• Pages: 7-11
• DOI: https://doi.org/10.4028/p-As3gtV
• Online since: November 2023
• Authors: Salima Aberkane*, Brahim Mehdi, Riad Badji
• Keywords: 316LSi, CMT-WAAM, Dislocation Density, Porosity

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