The influence of in situ formed precipitates on the plasticity of Fe-Nb-B-Cu bulk metallic glasses

被引：13
|
作者：
Park, Jin Man [1 ,2 ]
Kim, Do Hyang [1 ]
Stoica, Mihai [2 ]
Mattern, Norbert [2 ]
Li, Ran [3 ]
Eckert, Juergen [2 ,4 ]
机构：
[1] Yonsei Univ, Dept Met Engn, Ctr Noncrystalline Mat, Seoul 120749, South Korea
[2] Leibniz Inst Solid State & Mat Res Dresden, Inst Complex Mat, D-01171 Dresden, Germany
[3] Beihang Univ, Dept Mat Sci & Engn, Beijing 100191, Peoples R China
[4] Tech Univ Dresden, Inst Mat Sci, D-01062 Dresden, Germany
来源：
JOURNAL OF MATERIALS RESEARCH | 2011年 / 26卷 / 16期
关键词：
SHEAR BANDS; ENHANCED PLASTICITY; MECHANICAL-BEHAVIOR; MATRIX COMPOSITES; TENSILE DUCTILITY; ALLOYS; DEFORMATION; PHASES;
D O I：
10.1557/jmr.2011.202
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Improved room temperature plasticity was achieved by microalloying Cu in a series of (Fe(71)Nb(6)B(23))(100-x)Cu(x) (x = 0, 0.25, 0.5, 0.75, and 1) glass matrix alloys with tunable size and volume fraction of precipitates composed of alpha-Fe and Fe(23)B(6) phases. When similar to 10-nm-sized nano-scale precipitates are formed with a size comparable to the shear bandwidth by controlling the added content of Cu, the (Fe(71)Nb(6)B(23))(99.5)Cu(0.5) alloy exhibits a maximum plastic strain of 4.3 +/- 6 0.8% with pronounced multiple shear banding. A further increase in the size of the precipitates up to micrometer scale results in catastrophic fracture accompanied with irregular cracks, revealing that the fracture mechanism of the different alloys is controlled by the precipitate size.
引用
收藏
页码：2080 / 2086
页数：7
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