In the present work, Inconel 718 alloy is additively manufactured on the Ti-6Al-4V alloy, and a functionally graded material is built between Inconel 718 and Ti-6Al-4V alloys. The vanadium interlayer is applied to prevent the formation of detrimental intermetallic compounds between Ti-6Al-4V and Inconel 718 by direct joining. The additive manufacturing of Inconel 718 alloy is performed by changing the laser power and scan speed. The microstructures of the joint interface are characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, and micro X-ray diffraction. Additive manufacturing is successfully performed by changing the energy input. The micro Vickers hardness of the additive manufactured Inconel 718 dramatically increased owing to the presence of the Cr-oxide phase, which is formed by the difference in energy input.

Abstract
1. 서 론
2. 실험 방법
3. 결과 및 고찰
    3.1. 적층조형 시료의 거시 관찰
    3.2. 적층조형 시료의 미세조직 분석
    3.3. 마이크로 빔 XRD 분석
    3.4. 마이크로 비커스 경도
4. 결 론
References

• 박찬웅(국립한밭대학교 신소재공학과) | Chan Woong Park (Department of Materials Science & Engineering, Hanbat National University)
• 박진웅(국립한밭대학교 신소재공학과) | Jin Woong Park (Department of Materials Science & Engineering, Hanbat National University)
• 정기채(국립한밭대학교 신소재공학과) | Ki Chae Jung (Department of Materials Science & Engineering, Hanbat National University)
• 이세환(국방과학연구소) | Se-Hwan Lee (Agency for Defense Development)
• 김정한(국립한밭대학교 신소재공학과) | Jeoung Han Kim (Department of Materials Science & Engineering, Hanbat National University) Corresponding Author