비정질 합금의 조성분리가 소성에 미치는 영향:변형국부화 관점에서의 해석 : Effect of the Compositional Modulation on the Plasticity of Amorphous Alloys: Shear Localization Viewpoint Interpretation
Effect of the Compositional Modulation on the Plasticity of Amorphous Alloys: Shear Localization Viewpoint Interpretation
- 주제(키워드) amorphous alloy , phase-separation , structural disordering , shear localization , plasticity
- 발행기관 대한금속·재료학회
- 발행년도 2009
- 총서유형 Journal
- UCI G704-000085.2009.47.11.007
- KCI ID ART001390726
- 본문언어 한국어
초록/요약
Experiments have demonstrated that a moderate amount of Be added to Zr57.5Cu38.3Al4.2 amorphous alloy enhances the plasticity of the alloy. In particular, Zr54Cu36Al4Be6 alloy exhibited 19% of strain to fracture along with a strength exceeding 2 GPa. Energy dispersive x-ray spectroscopy conducted on the Zr54Cu36Al4Be6 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.
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