[P] P231~P243 Materials Processing

[P236] Crystallographic Lamellar Microstructure Formation Conditions Across Materials in PBF-LB

○Chin Cheng Tsai¹, Fabien Briffod², Takayuki Shiraiwa¹ (1. University of Tokyo, 2. NIMS)

Keywords:

Additive manufacturing,Crystallographic lamellar microstructure,Numerical simulation

This study verifies the CLM formation mechanism previously proposed for PBF-LB by extending the investigation to IN718 with a different laser spot size. ExaCA simulations and experiments showed that CLM did not form under the 50 μm spot condition, consistent with the proposed mechanism.