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

被引：5
|
作者：
Tariq, N. H. [1 ]
Akhter, J. I. [2 ]
Hasan, B. A. [1 ]
机构：
[1] Pakistan Inst Engn & Appl Sci, Powder Met Lab, Dept Chem & Mat Engn, Islamabad, Pakistan
[2] Pakistan Inst Nucl Sci & Technol, Div Phys, Islamabad, Pakistan
来源：
JOURNAL OF MATERIALS SCIENCE | 2010年 / 45卷 / 22期
关键词：
AMORPHOUS-ALLOYS; PLASTICITY; PRESSURE; FRACTURE; FLOW; COMPRESSION; EVOLUTION;
D O I：
10.1007/s10853-010-4707-x
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, effect of geometrical confinement on the deformation behavior of Zr(57.5)Cu(11.2)Ni(13.8)Al(17.5) bulk metallic glass (BMG) was investigated. For this purpose flat top conical samples with different semi-vertex angles (alpha) 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 alpha = 0A degrees) to conical shape (for which alpha > 0A degrees), 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 Zr(57.5)Cu(11.2)Ni(13.8)Al(17.5) specimen with alpha = 5A degrees, 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：4
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