Selective laser melting (SLM), a type of additive manufacturing (AM) technology, leads a global manufacturing trend by enabling the design of geometrically complex products with topology optimization for optimized performance. Using this method, three-dimensional (3D) computer-aided design (CAD) data components can be built up directly in a layer-by-layer fashion using a high-energy laser beam for the selective melting and rapid solidification of thin layers of metallic powders. Although there are considerable expectations that this novel process will overcome many traditional manufacturing process limits, some issues still exist in applying the SLM process to diverse metallic materials, particularly regarding the formation of porosity. This is a major processing-induced phenomenon, and frequently observed in almost all SLM-processed metallic components. In this study, we investigate the mechanical anisotropy of SLM-produced 316L stainless steel based on microstructural factors and highly-oriented porosity. Tensile tests are performed to investigate the microstructure and porosity effects on mechanical anisotropy in terms of both strength and ductility.

Abstract
 1. 서 론
 2. 실험 방법
 3. 결과 및 고찰
  3.1 미세조직 분석
  3.2 방향 별 인장 물성
 4. 결 론
 References

• 박정민(포항공과대학교 신소재공학과) | Jeong Min Park (Department of Materials Science and Engineering, POSTECH (Pohang University of Science and Technology))
• 전진명(포항공과대학교 신소재공학과) | Jin Myoung Jeon (Department of Materials Science and Engineering, POSTECH (Pohang University of Science and Technology))
• 김정기(포항공과대학교 신소재공학과) | Jung Gi Kim (Department of Materials Science and Engineering, POSTECH (Pohang University of Science and Technology))
• 성유진(포항공과대학교 신소재공학과) | Yujin Seong (Department of Materials Science and Engineering, POSTECH (Pohang University of Science and Technology))
• 박순홍(포항산업과학연구원 소재이용연구그룹) | Sun Hong Park (Materials Solution Research Group, RIST (Research Institute of Industrial Science and Technology))
• 김형섭(포항공과대학교 신소재공학과, 포항공과대학교 고엔트로피합금 연구단) | Hyoung Seop Kim (Department of Materials Science and Engineering, POSTECH (Pohang University of Science and Technology), Center for High Entropy Alloys, POSTECH (Pohang University of Science and Technology)) Corresponding Author