| Microstructure characteristics of as-surface nanocrystallized 1420 aluminum alloy by high-energy shot peening |
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| 作者姓名： | 胡兰青 王科 刘刚 许并社 |
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| 作者单位： | [1]CollegeofMaterialsScienceandEngineering,TaiyuanUniversityofTechnology,Taiyuan030024,China [2]CollegeofMaterialsScienceandEngineering,TaiyuanUniversityofTechnology,Taiyuan030024,China／／InstituteofMetalResearch,ChineseAcademyofSciences,Shenyang110016,China [3]InstituteofMetalResearch,ChineseAcademyofSciences,Shenyang110016,China |
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| 基金项目： | Project(20011019)supportedbytheYouthScienceFoundationofShanxiProvince,China |
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| 摘 要： | A nanostructured surface layer was fabricated on 1420 aluminum alloy by high-energy shot peening.Microstructures were characterized by X-ray diffractometer (XRD), transmission electron microscope (TEM) and high-resolution electron microscope(HRTEM), and microhardness measurement was conducted along the depth from top surface layer to matrix of the sample peened for 30 rain. The results show that a nanocrystalline layer about 20μm in thickness is formed on the surface of the sample after high-energy shot peening, in which the grain size is changed from about 20 nm to 100 nm. In the surface layer of 20-50μm in depth, the microstructure consists of submicron grains. The surface nanocrystallization is accomplished by dislocation slip. The microhardness of the top surface nanostructured layer is enhanced obviously after high-energy shot peening(HESP) compared with that of the coarse-grained matrix.
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| 关 键 词： | 1420铝合金 高能射流喷丸处理 表面纳米结晶 微结构 |
Microstructure characteristics of as-surface nanocrystallized 1420 aluminum alloy by high-energy shot peening |
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| HU lan-qing,WANG Ke,LIU Gang,XU Bin-she.Microstructure characteristics of as-surface nanocrystallized 1420 aluminum alloy by high-energy shot peening[J].Transactions of Nonferrous Metals Society of China,2005,15(3):615-618. |
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| Authors: | HU lan-qing WANG Ke LIU Gang XU Bin-she |
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| Abstract: | A nanostructured surface layer was fabricated on 1420 aluminum alloy by high-energy shot peening.Microstructures were characterized by X-ray diffractometer (XRD), transmission electron microscope (TEM) and high-resolution electron microscope(HRTEM), and microhardness measurement was conducted along the depth from top surface layer to matrix of the sample peened for 30 min. The results show that a nanocrystalline layer about 20 μm in thickness is formed on the surface of the sample after high-energy shot peening, in which the grain size is changed from about 20 nm to 100 nm. In the surface layer of 20 -50 μm in depth, the microstructure consists of submicron grains. The surface nanocrystallization is accomplished by dislocation slip. The microhardness of the top surface nanostructured layer is enhanced obviously after high-energy shot peening(HESP) compared with that of the coarse-grained matrix. |
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| Keywords: | 1420 alloy aluminum alloy high-energy shot peening surface nanocrystallization microstructure microhardness |
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