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한국주조공학회> 한국주조공학회지 (주조)

한국주조공학회지 (주조) update

JOURNAL OF THE KOREAN FOUNDRYMENS SOCIETY

  • : 한국주조공학회
  • : 공학분야  >  금속공학
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  • : 1598-706x
  • : 2288-8381
  • : 주조(~2000)→한국주조공학회지(2001~)

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수록범위 : 1권1호(1981)~39권2호(2019) |수록논문 수 : 2,046
한국주조공학회지 (주조)
39권2호(2019년) 수록논문
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1TiFe금속간 화합물의 Zr과 Ce첨가와 냉각속도에 따른 응고 조직 변화 및 기계적 특성

저자 : 노혜인 ( Hye-in No ) , 최창완 ( Chang-wan Choi ) , 이승훈 ( Seonghoon Yi )

발행기관 : 한국주조공학회 간행물 : 한국주조공학회지 (주조) 39권 2호 발행 연도 : 2019 페이지 : pp. 21-25 (5 pages)

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Microstructural and corresponding hardness changes of TiFe compounds with Zr (0~6 at%) or Ce (0~3 at%) were studied using samples prepared at different solidification rates. In arc-melted (TiFe)-Zr samples, the Fe23 Zr6 and (Ti, Zr)2Fe phases formed in the TiFe matrix, while in the (TiFe)-Ce sample, the CeO2 phase formed along the grain boundary of the TiFe matrix. As the Zr content was increased, the volume fractions of the Fe23 Zr6 and (Ti, Zr)2Fe phases increased, forming a network structure. Accordingly, the hardness values of the samples also increased. With a small addition of Ce of approximately 0.1 at%, the as-cast microstructure could be effectively refined, reducing the average grain boundary diameter from ~100 μm to ~14 μm. In the rapidly solidified sample prepared through a melt-spinning method, the constituent phases were identical to those of the arc-melted samples while the grains were refined. The microstructural changes of TiFe alloys can affect the hydrogen storage ability as well as the mobility of the hydrogen atoms in the alloys.

KCI등재

2급속응고법으로 제조한 과공정 Al-17Si-5Fe 합금 압출재의 미세조직 및 기계적 특성

저자 : 김태준 ( Tae-jun Kim ) , 김덕현 ( Se-dong Lee ) , 이세동 ( Ah-ruem Beck ) , 백아름 ( Duck-hyun Kim ) , 임수근 ( Su-gun Lim )

발행기관 : 한국주조공학회 간행물 : 한국주조공학회지 (주조) 39권 2호 발행 연도 : 2019 페이지 : pp. 26-31 (6 pages)

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In this study, the mechanical characteristics and microstructure of hypereutectic Al-17Si-5Fe extruded alloys prepared by a rapid solidification process (RSP) were investigated. The hypereutectic Al alloy was fabricated by means of RSP and permanent casting. For RSP, the Al alloy melted at 920oC, cooling the specimens at a rate of 106oC/s when the RSP was used, thus allowing the refining of primary Si particles more than when using permanent casting, at a rate of about 91%. We tested an extrusion RSP billet and a permanent-cast billet. Before the hot-extrusion process, heating to 450oC took place for one hour. The samples were then hotextruded with a condition of extrusion ratio of 27 and a ram speed of 0.5 mm/s. Microstructural analyses of the extruded RSP method and the permanent casting method were carried out with OM and SEM-EDS mapping. The mechanical properties in both cases were evaluated by Vickers micro-hardness, wear resistance and tensile tests. It was found that when hypereutectic Al-17Si-5Fe alloys were fabricated by a rapid solidification method, it becomes possible to refine Si and intermetallic compounds. During the preparation of the hypereutectic Al-17Si-5Fe alloy by the rapid solidification method, the pressure of the melting crucible was low, and at faster drum speeds, smaller grain alloy flakes could be produced. Hot extrusion of the hypereutectic Al-17Si-5Fe alloy during the rapid solidification method required higher pressure levels than hot extrusion of the permanent mold-casted alloy. However, it was possible to produce an extruded material with a better surface than that of the hot extruded material processed by permanent mold casting.

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1연안해역에서 석유오염물질의 세균학적 분해에 관한 연구

(2006)홍길동 외 1명심리학41회 피인용

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(2006)홍길동41회 피인용

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전북대학교 금오공과대학교 경북대학교 서울과학기술대학교(구 서울산업대학교) 조선대학교
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  • 2 금오공과대학교 (45건)
  • 3 경북대학교 (28건)
  • 4 서울과학기술대학교(구 서울산업대학교) (25건)
  • 5 조선대학교 (22건)
  • 6 울산대학교 (19건)
  • 7 공주대학교 (18건)
  • 8 부경대학교 (16건)
  • 9 순천대학교 (15건)
  • 10 한국산업기술대학교 (14건)

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