| 剪切变形方式下低碳钢表面纳米结构的形成 |
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| 引用本文： | 刘刚,莫成刚,武保林,左良.剪切变形方式下低碳钢表面纳米结构的形成[J].钢铁,2011,46(7):70-74. |
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| 作者姓名： | 刘刚 莫成刚 武保林 左良 |
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| 作者单位： | 1. 东北大学研究院,辽宁沈阳,110004
2. 沈阳航空航天大学材料工程系,辽宁沈阳,110136 |
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| 基金项目： | 国家自然科学基金资助项目(50071061) |
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| 摘 要： | 对低碳钢板材进行表面球磨处理，利用电子显微术研究剪切变形方式下深度方向的组织演变。结果表明，低碳钢的纳米化过程包括：位错通过增殖、运动、湮灭和重组形成位错墙；位错墙逐渐转变成小角度和大角度晶界，将原始粗晶分割成亚微晶；亚微晶内重复上述过程使晶粒继续细化，最终形成等轴状、取向接近随机分布的纳米晶组织。外力作用方向并未改变...
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| 关 键 词： | 低碳钢 球磨 表面纳米化 结构 |
Formation of Nanostructure on the Surface of Low Carbon Steel Subject to Shear Deformation |
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| LIU Gang,MO Cheng-gang,WU Bao-lin,ZUO Liang.Formation of Nanostructure on the Surface of Low Carbon Steel Subject to Shear Deformation[J].Iron & Steel,2011,46(7):70-74. |
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| Authors: | LIU Gang MO Cheng-gang WU Bao-lin ZUO Liang |
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| Affiliation: | LIU Gang1,MO Cheng-gang1,WU Bao-lin2,ZUO Liang1(1.Research Academy,Northeastern University,Shenyang 110004,Liaoning,China,2.Department of Materials Engineering,Shenyang Aerospace University,Shenyang 110136,China) |
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| Abstract: | A low carbon steel was treated by means of ball milling,and the shear-stress induced microstructural evolution along the depth was examined by using electron microscopy.The grain refinement process of low carbon steel includes: formation of dislocation walls through propagation,slip,annihilation and recombination of the dislocations;transformation of dislocation walls into small to large angle boundaries to refine the initial coarse grains into submicro-grains;further subdivision of submicro-grains by means... |
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| Keywords: | low carbon steel ball milling surface nanocrystallization structure |
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