한국주조공학회지 (Journal of Korea Foundry Society)
- 제11권5호
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- Pages.398-405
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- 1991
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- 1598-706X(pISSN)
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- 2288-8381(eISSN)
냉각속도에 따른 Al-2.7wt%Li 합금계의 응고조직
Solidification Structure of Al-2.7wt%Li Alloys by Cooling Rate Controlled
- Shim, Deung-Seub (Dept. of Materials Eng., Ajou Univ.) ;
- Choe, Jeong-Cheol (Dept. of Materials Eng., Ajou Univ.) ;
- Cho, Hyung-Ho (Korea Academy of Industrial Technology.) ;
- Kwon, Hae-Wook (Dept. of Metallurgical Eng., Youngnam Univ.)
- 발행 : 1991.10.20
초록
Al-Li alloy has a high strength with low density. Practically this alloy should use by the material which made from the rapid solidification. Therefore we examine the solidification structures of alloy with cooling rate. According to cooling rate increased, grain size and secondary dendrite arm spacing were smaller. Also grain size was further smaller by Zr added. To obtain more fine solidification structure, rapid solidification by single roll melt spinning was performed. According to higher wheel speed, cooling rate increased and cell size was smaller. Because of locally different cooling rate, different cell size was obtained in same specimen. More than cooling rate
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