通过表面高能喷丸(HESP)在Al-Zn-Mg合金表层形成等轴、随机取向的纳米晶粒,最小晶粒平均尺寸约为20 nm.表面层微观结构随距离表面深度的增加呈梯度变化,表面层依次可分为:纳米晶层(0～20 μm)、亚微米晶层(20～50μm)、过渡层(50～100 μm).随着距离表面深度的增加,纳米晶(NC)、亚晶(SMC)、位错胞(DC)的尺寸逐渐增大,微观结构从表层等轴状的纳米晶粒,过渡到亚表面层的亚晶粒或亚晶粒与位错胞共存.
参考文献
| [1] | Lu K;Lu J .Surface nanocrystallization (SNC) of metallic materials-presentation of the concept behind a new approach[J].Journal of Materials Science and Technology,1999,15(03):193. |
| [2] | Lu K;Lu J;Tao NR;Sui ML .Surface nanocrystallization of iron induced by ultrasonic shot peening[J].Nanostructured Materials,1999(4):433-440. |
| [3] | Wu X;Tao N;Hong Y et al.Microstructure and evolution of mechanically-induced ultrafine grain in surface layer of Alalloy subjected to USSP[J].ACTA MATERIALIA,2002,50:2075. |
| [4] | 雍兴平,刘刚,吕坚,卢柯.低碳钢表面纳米化处理及结构特征[J].金属学报,2002(02):157-160. |
| [5] | Tao N R;Wang Z B;Tong W P et al.An investigation of surface nanocrystallization mechanism in Fe induced by surface mechanical attrition treatment[J].ACTA MATERIALIA,2002,50:4603. |
| [6] | Liu G;Lu J;Lu K .Surface nanocrystallization of 316L stainless steel induced by ultrasonic shot peening[J].MATERIALS SCIENCE & ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2000,286:91. |
| [7] | Zhang H W;Hei Z K;Li G et al.Formation of nanostructured surface layer on AISI 304 stainless steel by means of surface mechanical attrition treatment[J].ACTA MATERIALIA,2003,51:1871. |
| [8] | Lu K;Lu J .Nanostructured surface layer on metallic materials induced by surface mechanical attrition treatment[J].MATERIALS SCIENCE & ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2004,375-377:38. |
| [9] | 张洪旺,刘刚,黑祖昆,吕坚,卢柯.表面机械研磨诱导AISI 304不锈钢表层纳米化Ⅰ.组织与性能[J].金属学报,2003(04):342-346. |
| [10] | 张洪旺,刘刚,黑祖昆,吕坚,卢柯.表面机械研磨诱导AISI 304不锈钢表层纳米化Ⅱ.晶粒细化机理[J].金属学报,2003(04):347-350. |
| [11] | Valiev RZ.;Alexandrov IV.;Islamgaliev RK. .Bulk nanostructured materials from severe plastic deformation [Review][J].Progress in materials science,2000(2):103-189. |
| [12] | Williams D B;Carter C B.Transmission electron microscopy[M].New York:Plenum Press,1996 |
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