한국주조공학회지 (Journal of Korea Foundry Society)

  • 제26권5호
  • /
  • Pages.227-231
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  • 2006
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  • 1598-706X(pISSN)
  • /
  • 2288-8381(eISSN)
한국주조공학회 (Korea Foundry Society)
권호 표지

벌크비정질합금의 액상 성형성 평가

Evaluation on Liquid Formability of Bulk Amorphous Alloys

  • 주혜숙 (연세대학교 대학원 금속공학과) ;
  • 강복현 (한국기술교육대학교 신소재공학과) ;
  • 김기영 (한국기술교육대학교 신소재공학과)
  • Joo, Hye-Sook (Dept. of Materials Engineering, Yonsei University) ;
  • Kang, Bok-Hyun (Dept. of Materials Engineering, Korea University of Technology and Education) ;
  • Kim, Ki-Young (Dept. of Materials Engineering, Korea University of Technology and Education)
  • 발행 : 2006.10.20
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초록

Liquid formability of bulk amorphous alloys is known to be very poor due to their high viscosity comparing with conventional metallic materials. It is important to have the fabricating technology of bulk amorphous alloys in order to make the components with complicated shape. Liquid formability includes the mold cavity filling ability and the hot tear(crack) resistance during solidification. A mold made of a commercial tool steel for the formability test was designed. Melting was performed by the arc melting furnace with melting capacity of 200 g in an argon atmosphere. Liquid formability and glass forming ability of Cu base and Ni base bulk amorphous alloys were measured and evaluated. Mold filling ability of Ni-Zr-Ti-Si-Sn alloy was better than that of Cu-Ni-Zr-Ti alloy, however the reverse is the hot tear resistance. Bulk amorphous alloy is very susceptible to crack if partial crystallization occurs during solidification. Crack resistance was thought to be closely related with the glass forming ability.

키워드

참고문헌

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