用X射线线形分析法(XLPA)测定了经表面机械研磨处理(SMAT)后纯铁的有效晶粒(亚晶)尺寸、微观应变、位错密度和体弹性储能密度,用TEM观察了组织形貌,并与40%拉伸试样进行了对比.结果表明:纯铁经SMAT 90 min后,平均位错密度高达1.0×10 16m-2,表面亚晶粒尺寸在7 nm左右;相对拉伸而言,SMAT对晶粒细化和引入微观应变的效果十分明显;XLPA法与TEM法得到的晶粒尺寸基本一致.
参考文献
| [1] | 程万军,高占民,黄良驹.20CrMnTi钢的位错密度及晶体结构[J].吉林大学学报(工学版),2004(01):31-34. |
| [2] | 高忠民,王文字,徐跃,李向山.用X射线线形精炼法分析纳米晶体的微观结构[J].吉林大学自然科学学报,2001(01):78-80. |
| [3] | Valiev RZ.;Alexandrov IV.;Islamgaliev RK. .Bulk nanostructured materials from severe plastic deformation [Review][J].Progress in materials science,2000(2):103-189. |
| [4] | K. Lu;J. Lu .Nanostructured surface layer on metallic materials induced by surface mechanical attrition treatment[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2004(0):38-45. |
| [5] | K. Wang;N.R. Tao;G. Liu .Plastic strain-Induced grain refinement at the nanometer scale in copper[J].Acta materialia,2006(19):5281-5291. |
| [6] | Zhilyaev AP.;Gubicza J.;Nurislamova G.;Revesz A.;Surinach S.;Baro MD. Ungar T. .Microstructural characterization of ultrafine-grained nickel[J].Physica Status Solidi, A. Applied Research,2003(2):263-271. |
| [7] | J. Gubicza;N.Q. Chinh;Z. Horita .Effect of Mg addition on microstructure and mechanical properties of aluminum[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2004(0):55-59. |
| [8] | T. Ungar;G. Tichy;J. Gubicza;Ft. J. Hellmig .Correlation between subgrains and coherently scattering domains[J].Powder diffraction,2005(4):366-375. |
| [9] | Ungar T;Gubicza J .Nanocrystalline materials studied by powder diffraction line profile analysis[J].Zeitschrift fur Kristallographie: International Journal for Structural, Physical, and Chemical Aspects of Crystalline Materials,2007(3/4):114-128. |
| [10] | Valiev RZ.;Alexandrov IV.;Islamgaliev RK. .Bulk nanostructured materials from severe plastic deformation [Review][J].Progress in materials science,2000(2):103-189. |
| [11] | J. Y. HUANG;Y. T. ZHU;H. JIANG .MICROSTRUCTURES AND DISLOCATION CONFIGURATIONS IN NANOSTRUCTURED Cu PROCESSED BY REPETITIVE CORRUGATION AND STRAIGHTENING[J].Acta materialia,2001(9):1497-1505. |
| [12] | Y.T. Zhu;J.Y. Huang;J. Gubicza;T. Ungar;Y.M. Wang;E. Ma;R.Z. Valiev .Nanostructures in Ti processed by severe plastic deformation[J].Journal of Materials Research,2003(8):1908-1917. |
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