Investigation of Surface Nanocrystallization by Pre-Forceing Rolling Technology

Jia Wu He; Shi Ning Ma; De Ma Ba

doi:10.4028/www.scientific.net/AMR.750-752.1963

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 750-752Investigation of Surface Nanocrystallization by...

Investigation of Surface Nanocrystallization by Pre-Forceing Rolling Technology

Abstract:

For solving fatigue failure of surface on the metal parts, the Surface Nanocrystallization technology by pre-forceing rolling was developed. The feature and operaing principle of equipment were introduced. A nanocrystalline surface layer was fabricated on deposited layer by using pre-forceing rolling technology (PFRT) .The microstructure of treated specimens was characterized by using scanning electron microscopy and transmission electron microscopy. Experimental evidence showed, The obvious plastic deformation layer was observed, the thickness of deformation layer is about 15μm. A nanocrystalline surface layer was found after PFRT treatment. The grain size of equiaxed nanocrystallites with random crystallographic orientations on the top surface layer was about 10nm. Experimental analysis indicated the coars crystal in the surface layer could be refined into nanocrystalline by using the pre-forceing rolling technology, attaining optimizing surface structure of metal parts.

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Periodical:

Advanced Materials Research (Volumes 750-752)

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1963-1966

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https://doi.org/10.4028/www.scientific.net/AMR.750-752.1963

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August 2013

Authors:

Jia Wu He, Shi Ning Ma, De Ma Ba

Keywords:

Deposited Layer, Pre-Forcing Rolling Technology, Surface Nanocrystallization

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