About this Abstract |
Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
Symposium
|
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
Presentation Title |
Understanding Hardening Behavior Induced by Interlayer Shot Peening in Laser Powder Bed Fusion of 316L Stainless Steel |
Author(s) |
Sejal Rhodes, Kaiz DeCastro, Jakob Zhang, Shreejith Ravisankar, Kossi Loic Mawunyegan Avegnon, Michael P. Sealy |
On-Site Speaker (Planned) |
Michael P. Sealy |
Abstract Scope |
This study investigates the effects of interlayer shot peening (SP) on the microhardness of 316L stainless steel fabricated by laser powder bed fusion (LPBF). Although previous work has demonstrated that interlayer peening can cause either hardening or softening, the underlying mechanisms governing when and why these opposing behaviors emerge remain unclear. To address this gap, four sample types were produced: as-printed, thermally cycled without peening, moderately peened, and severely peened. Shot peening was applied between layers to evaluate how varying degrees of cold work and thermal exposure influence residual stress development and microstructural stability. Surface height measurements revealed plastic sinking in severely peened samples, indicating subsurface deformation. This research aims to clarify the competing effects of interlayer peening on mechanical properties in LPBF metals and to inform strategies for optimizing strength and durability through process design. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |