Abstract：A low carbon steel was treated by means of ball milling, and the shear-stress induced microstructural evolution along the depth was examined by using electron microscopy. The grain refinement process of low carbon steel includes: formation of dislocation walls through propagation, slip, annihilation and recombination of the dislocations; transformation of dislocation walls into small to large angle boundaries to refine the initial coarse grains into submicro-grains; further subdivision of submicro-grains by means of dislocation activities leads to the formation of equiaxed grains with random orientations. The directions of external loads can not affect the grain refinement process, but can change the thickness of deformation layer, and the grain refinement process can be promoted in those grains with more active slip systems.
刘刚,莫成刚,武保林,左良. 剪切变形方式下低碳钢表面纳米结构的形成[J]. 钢铁, 2011, 46(7): 70-74.
Carbon Steel Subject to Shear DeformationLIU Gang1,MO Cheng-gang1，WU Bao-lin2,ZUO Liang1. Formation of Nanostructure on the Surface of Low. Iron and Steel, 2011, 46(7): 70-74.
2011, Vol. 46 
