Fabrication and Characterization of Bulk Nanocrystalline Layer on the Aluminum 6061 Surface by Shot Peening (SP)

Author:  Waikar, Guo
Source:  Conf Proc 2011: ICSP-11 South Bend, IN USA (pgs. 237-242)
Doc ID:  2011039
Year of Publication:  2011
Abstract:  
Abstract The fabrication of bulk nanocrystalline (NC) layers on aluminum alloy Al 6061-T6 using shot peening was investigated in this paper. The cross-sectional microstructure of the samples showed a sharp reduction of grain size to nano scale in the near surface. The NC layers were characterized using optical, scanning electron microscopy (SEM), transmission electron microscopy (TEM), microhardness and nanohardness measurements. 2-dimensional (2D) surface topography of the peened surface was also carried out to measure surface roughness. Roughness of the peened surfaces was dependent on the hardness of sample materials. NC layers of 20