대한금속재료학회지 (Korean Journal of Metals and Materials)

  • 제48권2호
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  • Pages.101-108
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  • 2010
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  • 1738-8228(pISSN)
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  • 2288-8241(eISSN)
대한금속재료학회 (The Korean Institute of Metals and Materials)
권호 표지
DOI QR코드

DOI QR Code

비정질 합금의 중주기배열구조 및 이 구조가 소성에 미치는 역할: 분자동력학적 연구

Medium-range Orders in Amorphous Alloys and Their Role on the Plasticity: A Molecular Dynamics Viewpoint Study

  • 이창면 (고려대학교 신소재공학부,한국생산기술연구원 열표면기술지원센터) ;
  • 이미림 (고려대학교 신소재공학부) ;
  • 이광렬 (한국과학기술연구원 계산과학센터) ;
  • 강경한 (POSTECH 신소재공학과) ;
  • 이병주 (POSTECH 신소재공학과) ;
  • 이재철 (고려대학교 신소재공학부)
  • Lee, Chang-Myeon (Department of Materials Science and Engineering, Korea University,Heat treatment & Plating Technology Service Center, KITECH) ;
  • Lee, Mirim (Department of Materials Science and Engineering, Korea University) ;
  • Lee, Kwang-Ryeol (Computational Science Center, KIST) ;
  • Kang, Kyung-Han (Department of Materials Science and Engineering, POSTECH) ;
  • Lee, Byeong-Joo (Department of Materials Science and Engineering, POSTECH) ;
  • Lee, Jae-Chul (Department of Materials Science and Engineering, Korea University)
  • 투고 : 2009.06.09
  • 발행 : 2010.02.20
⟨ 이전 논문 다음 논문 ⟩

초록

The local structural states of amorphous alloys have been depicted previously via short-range orders (SROs). However, the concept of SROs alone is inadequate and sometimes insufficient to explain the structure-property relation of the amorphous alloys. In this study, we propose new types of medium-range building structures that affect the mechanical properties, plasticity in particular. Using a combination of molecular dynamics simulations and the Voronoi tessellation method, we demonstrate a three-dimensional configuration of icosahedral medium-range orders (I-MROs) and elucidate how these icosahedral orders evolve by the application of shear deformation. It was observed that the structural stability of the icosahedral orders relies largely on how they are linked via percolation and this linking is explained in detail.

키워드

과제정보

연구 과제 주관 기관 : 한국과학재단, 고려대학교

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