Influence of Spatter on Porosity, Microstructure, and Corrosion of Additively Manufactured Stainless Steel Printed Using Different Island Size

Vukkum, Venkata Bhuvaneswari; Sanborn, Taylor; Shepherd, John; Saptarshi, Sourabh; Basu, Rakesh; Horn, Timothy; Gupta, Rajeev Kumar

doi:10.3390/cryst14040328

Influence of Spatter on Porosity, Microstructure, and Corrosion of Additively Manufactured Stainless Steel Printed Using Different Island Size

Journal Article · Sat Mar 30 00:00:00 EDT 2024 · Crystals

DOI:https://doi.org/10.3390/cryst14040328· OSTI ID:2441417

Vukkum, Venkata Bhuvaneswari ^[1]; Sanborn, Taylor ^[2]; Shepherd, John ^[2]; Saptarshi, Sourabh ^[2]; Basu, Rakesh ^[2]; ^[2]; ^[2]

North Carolina State University, Raleigh, NC (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
North Carolina State University, Raleigh, NC (United States)

Specimens of 316 L stainless steel were printed using laser powder bed fusion (LPBF), a popular metal additive manufacturing (AM) technique, with varying island sizes. Not many researchers have considered the impact of spatter while optimizing LPBF printing parameters. In this research, the influence of spatter was considered while also investigating the effect of varied island size on the microstructure, surface roughness, microhardness, and corrosion resistance of LPBF-316 L. No correlation was observed between surface roughness or microhardness and minor variations in island size. However, a correlation was drawn between varied island sizes and porosity in LPBF-316 L. The specimens associated with larger island sizes showed significantly enhanced corrosion resistance due to fewer manufacturing defects and reduced porosity, attributed to the minimal influence of the spatter. Based on analysis, the LPBF parameters were revised, which lead to superior corrosion resistance of LPBF-316 L, attributed to high density and reduced porosity.

View Accepted Manuscript (DOE)

Research Organization:: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Organization:: National Science Foundation (NSF); US Department of the Navy, Office of Naval Research (ONR); USDOE

Grant/Contract Number:: AC05-76RL01830

OSTI ID:: 2441417

Report Number(s):: PNNL-SA--197190

Journal Information:: Crystals, Journal Name: Crystals Journal Issue: 4 Vol. 14; ISSN 2073-4352

Publisher:: MDPICopyright Statement

Country of Publication:: United States

Language:: English

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