Laser Powder Bed Fusion 공정으로 제조된 Ti-6Al-4V 격자 구조물의 최적 설계 기법 연구

김지윤; 우정민; 손용호; 김정호; 이기안

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자료유형: 학술저널

저자정보: 김지윤 (인하대학교) 우정민 (인하대학교 항공우주공학과) 손용호 (University of Central Florida) 김정호 (인하대학교) 이기안 (인하대학교)

저널정보: 한국분말야금학회 한국분말야금학회지 한국분말재료학회지 제30권 제2호

발행연도: 2023.4

수록면: 146 - 155 (10page)

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The Ti-6Al-4V lattice structure is widely used in the aerospace industry owing to its high specific strength, specific stiffness, and energy absorption. The quality, performance, and surface roughness of the additively manufactured parts are significantly dependent on various process parameters. Therefore, it is important to study process parameter optimization for relative density and surface roughness control. Here, the part density and surface roughness are examined according to the hatching space, laser power, and scan rotation during laser-powder bed fusion (LPBF), and the optimal process parameters for LPBF are investigated. It has high density and low surface roughness in the specific process parameter ranges of hatching space (0.06–0.12 mm), laser power (225–325 W), and scan rotation (15°). In addition, to investigate the compressive behavior of the lattice structure, a finite element analysis is performed based on the homogenization method. Finite element analysis using the homogenization method indicates that the number of elements decreases from 437,710 to 27 and the analysis time decreases from 3,360 to 9 s. In addition, to verify the reliability of this method, stress–strain data from the compression test and analysis are compared.

#Laser Powder Bed Fusion #Ti-6Al-4V #Lattice structure #Finite Element Analysis #Homogenization method

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