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.
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页码：6170 / 6173
页数：3
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