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 |
Influence of Selective Rescanning on Microstructural Evolution and Properties of LPBF Ti6Al-4V Parts |
Author(s) |
Kalyan Nandigama, Bharath Bhushan Ravichander, Yash Parikh, Golden Kumar |
On-Site Speaker (Planned) |
Kalyan Nandigama |
Abstract Scope |
Laser powder bed fusion (LPBF) is a layer-wise manufacturing technique that can engineer desired localized microstructures in metallic components. Recent advancements in tailoring grain morphology and in-situ phase evolution by selectively rescanning the fabricated layers have received special attention. Rescanning reheats selected regions intuitively while fabrication, triggering the localized recrystallization. In this study, LPBF fabricated TI-6Al-4V(Ti64) samples were tailored through systematic variation of laser power, scan speed, and hatch spacing during rescanning. The effectiveness of these variations in processing conditions on relative density, grain morphology, microhardness, and electrochemical behavior was analyzed. The rescanned samples were found to possess superior properties compared to their non-rescanned counterparts. These findings demonstrate the potential of rescanning not just for surface refinement but as a tool to induce site-specific microstructure for property optimization, opening new pathways for performance-driven design in LPBF-manufactured Ti64 components. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |