Study on Fatigue Crack Nucleation of Electrodeposited Nanocrystalline Nickel

Ji Jia Xie; Xiao Lei Wu; You Shi Hong

doi:10.4028/www.scientific.net/AMR.33-37.925

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 33-37Study on Fatigue Crack Nucleation of...

Study on Fatigue Crack Nucleation of Electrodeposited Nanocrystalline Nickel

Abstract:

The mechanism of fatigue crack nucleation for nanocrystalline (nc) nickel was experimentally investigated in this paper. The samples of electrodeposited nc nickel were loaded cyclically by using a three point bending instrument at first. Then, atomic force microscopy (AFM) was used to scanning the sample surface after fatigue testing. The results indicated that, after fatigue testing, there are vortex-like cells with an average size of 108nm appeared along the crack on nc nickel sample. And, the roughness of sample surface increased with the maximum stress at the surface