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1.0×1016 m-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.
所属栏目
试验研究上海市科技发展基金资助项目(0210nm017)
收稿日期
2007/12/262008/5/6
作者单位
许为宗:上海交通大学材料科学与工程学院, 上海 200030
李伟:上海交通大学材料科学与工程学院, 上海 200030
戎咏华:上海交通大学材料科学与工程学院, 上海 200030
备注
许为宗(1984-),男,上海人,硕士研究生.
引用该论文:
XU Wei-zong,LI Wei,RONG Yong-hua.Characterization of Microstructural Parameters of Pure Iron after Surface Mechanical Attrition Treatment[J].Materials for mechancial engineering,2009,33(1):1～4
许为宗,李伟,戎咏华.纯铁经表面机械研磨处理后微结构参量的表征[J].机械工程材料,2009,33(1):1～4
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