서지주요정보
자장에 의한 용융금속의 대류 억제와 일방향 응고에 미치는 영향에 관한 연구 = Suppression of convection in melt by magnetic field and its effects on unidirectional solidification
서명 / 저자 자장에 의한 용융금속의 대류 억제와 일방향 응고에 미치는 영향에 관한 연구 = Suppression of convection in melt by magnetic field and its effects on unidirectional solidification / 강만석.
발행사항 [대전 : 한국과학기술원, 1993].
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소장정보

등록번호

8003805

소장위치/청구기호

학술문화관(문화관) 보존서고

MMS 93018

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리뷰정보

초록정보

Dilute Al-Cu and Al-Mg alloys were solidified unidirectionally upward under transverse magnetic field and the solute distribution in the grown solid was analyzed by emission spectrometer for macro-segregation. A non-steady state solidification was observed where the solute concentration in the grown solid decreased with the progress of solidification, when a dilute Al-Cu alloy was solidified with positive axial temperature gradient. This was caused by sedimentaion of Cu-rich melt during melt-down of the bar stock. In the case of Al-Mg alloy, the solute concentration in the grown solid increases with the progress of solidification because of solutal or thermosolutal convection. Reduction of convection intensity in the melt and therefore the reduction of axial macro-segregation in all of dilute Al-Cu and Al-Mg alloys were achieved by the presence of a transverse magnetic field. The character of the convection was discussed in view of solutal and thermosolutal convection and convection criterions are proposed to combine the solutal Rayleigh number, $Ra_S$ and the thermal Rayleigh number, $Ra_T$. For the estimation of the effect of the magnetic field the solutal Grashof number, $Gr_S$ and the square of the Hartman number were combined.

서지기타정보

서지기타정보
청구기호 {MMS 93018
형태사항 [iii], 61 p. : 삽화 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Man-Sug Kang
지도교수의 한글표기 : 이진형
지도교수의 영문표기 : Zin-Hyoung Lee
학위논문 학위논문(석사) - 한국과학기술원 : 재료공학과,
서지주기 참고문헌 : p. 60-61
주제 Solidification.
Magnetic fields.
Heat --Convection.
Aluminum-magnesium alloys.
일방향성 응고. --과학기술용어시소러스
자기장 효과. --과학기술용어시소러스
알루미늄 합금. --과학기술용어시소러스
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