Effect of sample geometry on the deformation behavior of Zr-based bulk metallic glass

被引:0
作者
N. H. Tariq
J. I. Akhter
B. A. Hasan
机构
[1] Pakistan Institute of Engineering and Applied Sciences,Powder Metallurgy Lab, Department of Chemical and Materials Engineering
[2] Pakistan Institute of Nuclear Science and Technology,Physics Division
来源
Journal of Materials Science | 2010年 / 45卷
关键词
Differential Scanning Calorimetry; Shear Band; Bulk Metallic Glass; Conical Sample; Show Scanning Electron Microscope Image;
D O I
暂无
中图分类号
学科分类号
摘要
In this study, effect of geometrical confinement on the deformation behavior of Zr57.5Cu11.2Ni13.8Al17.5 bulk metallic glass (BMG) was investigated. For this purpose flat top conical samples with different semi-vertex angles (α) were prepared for quasi-static compression tests. It was observed that as the geometry of the sample is slightly changed from cylindrical shape (for which α = 0°) to conical shape (for which α > 0°), a brittle BMG sample tends to deform in a ductile manner due to the geometrical constraint-induced complex multi-axial stress distribution in the sample. In brittle Zr57.5Cu11.2Ni13.8Al17.5 specimen with α = 5°, plastic deformation of about 4% was observed due to the formation of extensive intersecting shear bands.
引用
收藏
页码:6170 / 6173
页数:3
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