Effect of the Compositional Modulation on the Plasticity of Amorphous Alloys: Shear Localization Viewpoint Interpretation

Title
Effect of the Compositional Modulation on the Plasticity of Amorphous Alloys: Shear Localization Viewpoint Interpretation
Authors
이미림박경원사현제이재철
Keywords
amorphous alloy; phase-separation; structural disordering; shear localization; plasticity
Issue Date
2009-11
Publisher
대한금속 . 재료학회지; Journal of the Korean Institute of Metals and Materials
Citation
VOL 47, NO 11, 687-693
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/36826
ISSN
1738-8228
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KIST Publication > Article
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