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《Materials for Mechanical Engineering》 2009-01
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Characterization of Microstructural Parameters of Pure Iron after Surface Mechanical Attrition Treatment

XU Wei-zong,LI Wei,RONG Yong-hua(Shanghai Jiaotong University,Shanghai 200030,China)  
The microstructural features of pure iron after surface mechanical attrition treatment(SMAT),such as effective grain(subgrain) size,micro-distortion,dislocation density and elastic stored energy density,were determined by the X-ray line profile analysis(XLPA).The microstructure was observed by SEM and compared to tensile samples with 40% deformation.The results indicate that for pure iron sample prepared by SMAT for 90 min the average dislocation density was 1.0×1016 m-2 and the effective grain size was about 7 nm,which produced the most effective grain refinement and the greatest micro-distortion compared with the tensile sample.The grain sizes determined by XLPA and TEM methods were very close.
【Fund】: 上海市科技发展基金资助项目(0210nm017)
【CateGory Index】: TG580.68
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