Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Effect of the Compositional Modulation on the Plasticity of Amorphous Alloys: Shear Localization Viewpoint Interpretation

비정질 합금의 조성분리가 소성에 미치는 영향: 변형국부화 관점에서의 해석

  • Lee, Mi-Rim (Department of Materials Science and Engineering, Korea University) ;
  • Park, Kyoung-Won (Advanced Functional Materials Research Center, Korea Institute of Science and Technology) ;
  • Sa, Hyun-Je (Department of Materials Science and Engineering, Korea University) ;
  • Lee, Jae-Chul (Department of Materials Science and Engineering, Korea University)
  • 이미림 (고려대학교 신소재공학부) ;
  • 박경원 (기능금속연구센터 한국과학기술연구원) ;
  • 사현제 (고려대학교 신소재공학부) ;
  • 이재철 (고려대학교 신소재공학부)
  • Received : 2009.05.11
  • Published : 2009.11.25
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Abstract

Experiments have demonstrated that a moderate amount of Be added to $Zr_{57.5}Cu_{38.3}Al_{4.2}$ amorphous alloy enhances the plasticity of the alloy. In particular, $Zr_{54}Cu_{36}Al_{4}Be_{6}$ alloy exhibited 19% of strain to fracture along with a strength exceeding 2 GPa. Energy dispersive x-ray spectroscopy conducted on the $Zr_{54}Cu_{36}Al_{4}Be_{6}$ alloy exhibited the presence of compositional modulation, indicating that nm-scale phase separation had occurred at local regions. In this study, the role played by the nm-scale phase separation on the plasticity was investigated in terms of structural disordering, structural softening and shear localization in order to better understand the structural origin of the enhanced plasticity shown by the developed alloy.

Keywords

Acknowledgement

Supported by : 한국학술진흥재단

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