Induced Plasticity of a Brittle (La, Ce)-Based Bulk Metallic Glass by Surface Corrosion
Unexpected facture without any room-temperature plasticity severely limits potential structural applications of bulk metallic glasses (BMGs), especially La-, Mg- and Fe-based ones. In this study, a simple free corrosion method was provided to improve the plasticity of a brittle (La, Ce)-based BMG by...
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Published in | 金属学报:英文版 no. 2; pp. 129 - 133 |
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Main Author | |
Format | Journal Article |
Language | English |
Published |
2016
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Subjects | |
Online Access | Get full text |
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Abstract | Unexpected facture without any room-temperature plasticity severely limits potential structural applications of bulk metallic glasses (BMGs), especially La-, Mg- and Fe-based ones. In this study, a simple free corrosion method was provided to improve the plasticity of a brittle (La, Ce)-based BMG by the introduction of high-density corrosion defects on the surface. The influences of immersing time in 0.1 mol/L H2SO4 aqueous solution on the surface morphology and mechanical properties of the BMG were evaluated. With increasing immersing time from 5 to 30 min, the degree of surface corrosion increased obviously, and the distribution of corrosion defects became more homogenous. In the samples, the yielding phenomenon and certain plasticity appeared up to 0.3% after the surface treatment. The yielding and plasticity can be attributed to easier nucleation of shear bands on the defect surface rather than on the glabrous surface. The results provided a novel method to improve the plasticity of BMGs. |
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AbstractList | Unexpected facture without any room-temperature plasticity severely limits potential structural applications of bulk metallic glasses (BMGs), especially La-, Mg- and Fe-based ones. In this study, a simple free corrosion method was provided to improve the plasticity of a brittle (La, Ce)-based BMG by the introduction of high-density corrosion defects on the surface. The influences of immersing time in 0.1 mol/L H2SO4 aqueous solution on the surface morphology and mechanical properties of the BMG were evaluated. With increasing immersing time from 5 to 30 min, the degree of surface corrosion increased obviously, and the distribution of corrosion defects became more homogenous. In the samples, the yielding phenomenon and certain plasticity appeared up to 0.3% after the surface treatment. The yielding and plasticity can be attributed to easier nucleation of shear bands on the defect surface rather than on the glabrous surface. The results provided a novel method to improve the plasticity of BMGs. |
Author | Ji-Juan Liu Ran Li Lian-Xiang Fang Ju Wang Tao Zhang |
AuthorAffiliation | Key Laboratory of Aerospace Materials and Performance(Ministry of Education), School of Materials Science andEngineering, Beihang University, Beijing 100191, China |
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DocumentTitleAlternate | Induced Plasticity of a Brittle (La, Ce)-Based Bulk Metallic Glass by Surface Corrosion |
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Notes | Metallic glasses; Corrosion plastic deformation mechanism; Rapid solidification; Microstructure Unexpected facture without any room-temperature plasticity severely limits potential structural applications of bulk metallic glasses (BMGs), especially La-, Mg- and Fe-based ones. In this study, a simple free corrosion method was provided to improve the plasticity of a brittle (La, Ce)-based BMG by the introduction of high-density corrosion defects on the surface. The influences of immersing time in 0.1 mol/L H2SO4 aqueous solution on the surface morphology and mechanical properties of the BMG were evaluated. With increasing immersing time from 5 to 30 min, the degree of surface corrosion increased obviously, and the distribution of corrosion defects became more homogenous. In the samples, the yielding phenomenon and certain plasticity appeared up to 0.3% after the surface treatment. The yielding and plasticity can be attributed to easier nucleation of shear bands on the defect surface rather than on the glabrous surface. The results provided a novel method to improve the plasticity of BMGs. 21-1361/TG |
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Snippet | Unexpected facture without any room-temperature plasticity severely limits potential structural applications of bulk metallic glasses (BMGs), especially La-,... |
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SubjectTerms | H2SO4溶液 块体金属玻璃 块体非晶合金 大块金属玻璃 室温塑性 浸泡时间 腐蚀缺陷 表面腐蚀 |
Title | Induced Plasticity of a Brittle (La, Ce)-Based Bulk Metallic Glass by Surface Corrosion |
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