|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Thermal and Mechanical Stability of Nanocrystalline Materials
||Microstructure Characterization and Mechanical Properties of Nanostructured Low Activation Steel Produced by Surface Mechanical Attrition Treatment
||Wenbo Liu, Di Yun, Chaohui He, Chi Zhang, Zhigang Yang
|On-Site Speaker (Planned)
Surface mechanical attrition treatment (SMAT) was used to produce a nanocrystalline layer on the surface of reduced activation ferrite/martensite (RAFM) steel. X-ray diffraction (XRD), Transmission Electron Microscopy (TEM) and Electron Backscattered Diffraction (EBSD) were used to characterize the microstructure in the surface layer before and after SMAT. Both cross-sectional TEM images and EBSD maps indicated that nanocrystalline grains were produced by SMAT on the surface of RAFM steel, and the grain size decreased gradually with increasing deformation strain and strain rate during SMAT. Cross-sectional EBSD maps of samples before and after SMAT showed that the depth of the deformation layer during SMAT is about 200 um, and analysis of the misorientation angles after SMAT showed that there are more grain boundaries (GBs) with misorientation angles smaller than 5 degree in the surface layer. Changes of Vickers hardness along depth from the topmost surface after SMAT was also measured and analyzed.
||Planned: Supplemental Proceedings volume