[P] P112~P126

[P119] Investigation of keyhole acoustic emission signature during LPBF process

*Louis Galiegue¹, Fabien Briffod², Kaita Ito², Makoto Watanabe², Takayuki Shiraiwa¹, Manabu Enoki³ (1. The University of Tokyo、2. NIMS、3. Tokyo University of Technology)

Keywords:

Laser Powder Bed Fusion,Acoustic Emission,Keyhole,Plume,Process monitoring

LPBF AE monitoring was conducted with plume imaging to try and understand the origin of AE. Characteristics of recorded waveform gives insight on instability and depth of the keyhole.