논문 국내 국내전문학술지(KCI급) DED 공정으로 제조된 경사조성재료 (STS 316L과 저합금강)의 미세조직 및 기계적특성 평가
- 학술지 구분 국내전문학술지(KCI급)
- 게재년월 2022-08
- 저자명 김정한,양승용,추웅,신기승,윤지현
- 학술지명 한국분말재료학회지
- 발행처명 한국분말재료학회
- 발행국가 국내
- 논문언어 한국어
- 전체저자수 5
홈페이지논문 초록 (Abstract)
In this study, additive manufacturing of a functionally graded material (FGM) as an alternative to joiningdissimilar metals is investigated using directed energy deposition (DED). FGM consists of five different layers, whichare mixtures of austenitic stainless steel (type 316 L) and low-alloy steel (LAS, ferritic steel) at ratios of 100:0 (Alayer), 75:25 (B layer), 50:50 (C layer), 25:75 (D layer), and 0:100 (E layer), respectively, in each deposition layer. TheFGM samples are successfully fabricated without cracks or delamination using the DED method, and specimens arecharacterized using optical and scanning electron microscopy to monitor their microstructures. In layers C and D of thesample, the tensile strength is determined to be very high owing to the formation of ferrite and martensite structures.However, the elongation is high in layers A and B, which contain a large fraction of austenite.