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논문 기본 정보

자료유형
학술저널
저자정보
Yool Byun (Korea Institute of Materials Science (KIMS)) Sangwon Lee (Korea Institute of Materials Science (KIMS)) Seong‑Moon Seo (Korea Institute of Materials Science (KIMS)) Jong‑taek Yeom (Korea Institute of Materials Science (KIMS)) Seung Eon Kim (Korea Institute of Materials Science (KIMS)) Namhyun Kang (Pusan National University) Jaekeun Hong (Korea Institute of Materials Science (KIMS))
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.24 No.6
발행연도
2018.1
수록면
1,213 - 1,223 (11page)

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초록· 키워드

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The effects of Cr and Fe addition on the mechanical properties of Ti–6Al–4V alloys prepared by direct energy depositionwere investigated. As the Cr and Fe concentrations were increased from 0 to 2 mass%, the tensile strength increased becauseof the fine-grained equiaxed prior β phase and martensite. An excellent combination of strength and ductility was obtainedin these alloys. When the Cr and Fe concentrations were increased to 4 mass%, extremely fine-grained martensitic structureswith poor ductility were obtained. In addition, Fe-added Ti–6Al–4V resulted in a partially melted Ti–6Al–4V powder becauseof the large difference between the melting temperatures of the Fe eutectic phase (Ti–33Fe) and the Ti–6Al–4V powder,which induced the formation of a thick liquid layer surrounding Ti–6Al–4V. The ductility of Fe-added Ti–6Al–4V was thuspoorer than that of Cr-added Ti–6Al–4V.

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