Fatigue Behavior of Cast Steel ZG20SiMn under Stain Control Mode

Yuan Yuan Li; Feng Li; Xin Che; Li Jia Chen

doi:10.4028/www.scientific.net/AMR.399-401.2236

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Fatigue Behavior of Cast Steel ZG20SiMn under Stain Control Mode
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Fatigue Behavior of Cast Steel ZG20SiMn under Stain Control Mode

Abstract:

Abstract: The fatigue behavior of cast steel ZG20SiMn under strain control mode was investigated, and the influence of imposed total strain amplitude on the cyclic deformation and fracture behavior of the cast steel ZG20SiMn was determined. The experimental results reveal that during fatigue deformation, the cast steel ZG20SiMn may exhibit the cyclic strain hardening and stable cyclic stress response behavior, which mainly depends on the imposed total strain amplitude. The relationship between plastic and elastic strain amplitudes with reversals to failure shows a single linear behavior, and can be well described by the Coffin-Manson and Basquin equations, respectively. At different total strain amplitudes, the fatigue cracks initiate at the free surface of fatigue specimens and propagate for the cast steel ZG20SiMn.