About this Abstract |
Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Symposium
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2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
Presentation Title |
Controlled Residual Stress Evolution in LPBF 316SS Through Interlayer Shot Peening |
Author(s) |
Isabella Barney, Jackson Emerson, Aidan Pierce, Claire Soller, Adam Walker, Sivasubramanian Chandramouli, Michael P. Sealy |
On-Site Speaker (Planned) |
Michael P. Sealy |
Abstract Scope |
Tensile residual stress remains a critical challenge in laser powder bed fusion (LPBF) of austenitic stainless steels, limiting performance and service life in high-reliability aerospace applications. This study evaluates interlayer shot peening (ILSP) as an in-situ method to control residual stress development in LPBF-fabricated 316L stainless steel. Emphasis is placed on the quantitative characterization of residual stress gradients and their dependence on build direction and peening parameters. Results reveal that strategically applied interlayer peening effectively reduces tensile stresses and promotes the formation of compressive stress states. This stress redistribution significantly decreases crack susceptibility and improves interlayer bonding. The findings demonstrate a pathway to enhance both surface and bulk mechanical properties, offering a strategy to increase strength while preserving ductility in additively manufactured components. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |