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About this Abstract
Meeting 2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
Symposium 2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
Presentation Title Effect of Spatial Beam Profile Shaping on Denudation Zone in PBF-LB of Stainless Steel
Author(s) Tadashi Yamaguchi, Keuisuke Takenaka, Yorihiro Yamashita, Takahiro Kunimine, Yuji Sato, Masahiro Tsukamoto
On-Site Speaker (Planned) Tadashi Yamaguchi
Abstract Scope Powder Bed Fusion with Laser Beam (PBF-LB) is a metal additive manufacturing using a laser. However, PBF-LB still faces several issues including rough surfaces and void formation. Denudation zones (DZs), formed along the melt track during laser irradiation, are considered one of the major factors of these defects. Spatial beam profile shaping has attracted attention as a promising approach for suppression of DZ. Gaussian beam exhibits high peak power density at the beam center, which promotes excessive metal vapor generation. In this study, laser beam profile was shaped into a flat-top distribution to reduce the peak power density while maintaining the same laser power and spot diameter. The results demonstrated that a flat-top beam significantly reduced both DZ formation and metal vapor generation compared with Gaussian beam.
Proceedings Inclusion? Undecided

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