| 塑性变形对Mg-Gd-Y-Zr合金析出行为及拉伸断裂行为的影响 |
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| 引用本文： | 林丹,王磊,刘杨,崔建忠,乐启炽.塑性变形对Mg-Gd-Y-Zr合金析出行为及拉伸断裂行为的影响[J].中国有色金属学会会刊,2011(10):2160-2167. |
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| 作者姓名： | 林丹 王磊 刘杨 崔建忠 乐启炽 |
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| 作者单位： | 东北大学材料各向异性与织构教育部重点实验室;东北大学材料电磁过程研究教育部重点实验室; |
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| 基金项目： | Project(IRT0713) supported by the Program for Changjiang Scholars and Innovative Research Team in Chinese University; Projects(2007CB613701,2007CB613702) supported by the National Basic Research Program of China |
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| 摘 要： | 研究塑性变形对Mg-10Gd-3Y-0.6Zr合金析出行为及拉伸断裂行为的影响。结果表明：塑性变形引发的晶体缺陷为时效析出提供了更多的形核核心,不仅使β′相的数量增加,还促进晶界、孪晶与基体界面处析出相的生成。析出相数量的增多可有效阻碍拉伸变形过程中的位错滑移从而强化合金基体,2%变形合金可实现强度与塑性的良好配合。塑性变形量增大,微裂纹在晶界析出相与基体界面处产生并沿晶界扩展,再加之断口表面平滑刻面的形成导致合金的拉伸性能降低。
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| 关 键 词： | Mg-Gd-Y-Zr合金 塑性变形 断裂行为 拉伸性能 显微组织 |
Effects of plastic deformation on precipitation behavior and tensile fracture behavior of Mg-Gd-Y-Zr alloy |
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| LIN Dan,WANG Lei,LIU Yang,CUI Jian-zhong,LE Qi-chi .Key Laboratory for Anisotropy , Texture of Materials,Ministry of Education,Northeastern University,Shenyang ,China,.Key Laboratory of Electromagnetic Processing of Materials.Effects of plastic deformation on precipitation behavior and tensile fracture behavior of Mg-Gd-Y-Zr alloy[J].Transactions of Nonferrous Metals Society of China,2011(10):2160-2167. |
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| Authors: | LIN Dan WANG Lei LIU Yang CUI Jian-zhong LE Qi-chi Key Laboratory for Anisotropy Texture of Materials Ministry of Education Northeastern University Shenyang China Key Laboratory of Electromagnetic Processing of Materials |
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| Affiliation: | LIN Dan1,WANG Lei1,LIU Yang1,CUI Jian-zhong2,LE Qi-chi2 1.Key Laboratory for Anisotropy and Texture of Materials,Ministry of Education,Northeastern University,Shenyang 110004,China,2.Key Laboratory of Electromagnetic Processing of Materials |
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| Abstract: | The effects of plastic deformation on precipitation behavior and tensile fracture behavior of Mg-10Gd-3Y-0.6Zr alloy were investigated.The results indicate that more precipitation cores can be provided by the crystal defects caused by the plastic deformation,as well as increasing the amount of β＇ phases,and the formation of precipitations at grain boundaries and interfaces between the twins and matrix.Because of an increase in precipitations,the dislocation slipping during deformation process is effectively hindered and the matrix is strengthened,especially for the 2% deformed alloy which can achieve a good combination of strength and ductility.With increasing the plastic deformation,the microcracks occur at the interface between grain boundary precipitations and matrix,and then propagate intergranularly.When intergranular fracture combines with the formation of smoothing facets on the fracture surface,the tensile properties decrease. |
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| Keywords: | Mg-Gd-Y-Zr alloy plastic deformation fracture behavior tensile property microstructure |
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