Powder characteristics, such as density, size, shape, thermal properties, and surface area, are of significant importance in the powder bed fusion (PBF) process. The powder required is exclusive for an efficient PBF process. In this study, the particle size distribution suitable for the powder bed fusion process was derived by modeling the PBF product using simulation software (GeoDict). The modeling was carried out by layering sintered powder with a large particle size distribution, with 50 μm being the largest particle size. The results of the simulation showed that the porosity decreased when the mean particle size of the powder was reduced or the standard deviation increased. The particle size distribution of prepared titanium powder by the atomization process was also studied. This study is expected to offer direction for studies related to powder production for additive manufacturing.

Abstract
1. Introduction
2. Modeling and Simulation Method
    2.1 프로그램 소개 및 기능
    2.2 실험 가정
    2.3 분말 입도의 종류
    2.4 모델링 방안
3 Results and Discussion
    3.1 Case 1 시뮬레이션 결과
    3.2 Case 2 시뮬레이션 결과
    3.3 시뮬레이션 결론 및 분석
4. Conclusions
References

• 이화선(한국생산기술연구원 한국희소금속산업기술센터) | Hwaseon Lee (Korea Institute for Rare Metals, Korea Institute of Industrial Technology)
• 김대겸(한국생산기술연구원 한국희소금속산업기술센터) | Dae-Kyeom Kim (Korea Institute for Rare Metals, Korea Institute of Industrial Technology)
• 김영일(한국생산기술연구원 한국희소금속산업기술센터) | Young Il Kim (Korea Institute for Rare Metals, Korea Institute of Industrial Technology)
• 남지은(트리니티 엔지니어링 MMA팀) | Jieun Nam (MMA team, Trinity Engineering)
• 손용(한국생산기술연구원 디지털제조공정그룹) | Yong Son (Digital Manufacturing Process Group, Korea Institute of Industrial Technology)
• 김택수(한국생산기술연구원 한국희소금속산업기술센터) | Taek-Soo Kim (Korea Institute for Rare Metals, Korea Institute of Industrial Technology)
• 이빈(한국생산기술연구원 한국희소금속산업기술센터) | Bin Lee (Korea Institute for Rare Metals, Korea Institute of Industrial Technology) Corresponding Author