Effect of cross shear rolling on microstructure and properties of surface nanocrystallized 316L stainless steel
LÜ Aiqiang; ZHANG Yang; LI Ying; LIU Gang; LIU Chunming
School of Materials and Metallurgy; Northeastern University; Shenyang 110004；Shenyang National Laboratory for Materials Science; Institute of Metal Research; The Chinese Academy of Sciences; Shenyang 110016
Cite this article:
LÜ Aiqiang; ZHANG Yang; LI Ying; LIU Gang; LIU Chunming. Effect of cross shear rolling on microstructure and properties of surface nanocrystallized 316L stainless steel. Acta Metall Sin, 2005, 41(3): 271-276 .
Abstract Nanostructured layer with a certain thickness and grain size of
10-30 nm was synthesized on a 316L
stainless steel by surface mechanical
attrition treatment (SMAT) for 60 min. The change of microstructure and
properties in the surface layer after cross shear rolling (CSR, 80\%
reduction) was investigated. The results show
that the nanocrystalline structure was still
maintained, however, the grain size became finer (5-15 nm) and more
uniform and the surface roughness was remarkably reduced. The hardness
in the surface layer was slightly increased, but that of the
matrix was remarkably increased. The corrosion resistance in 0.05
mol/L H2SO4+0.25 mol/L Na2SO4 solution was improved, but still lower than that of the matrix.
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