Research on strain fatigue behavior of ZG20SiMn cast steel
LI Yuan-yuan
CHE Xin
LI Feng
CHEN Li-jia
Abstract：In order to understand the cyclic deformation and fracture behaviors of ZG20SiMn cast steel,the fatigue behavior of ZG20SiMn cast steel was investigared under the strain-controlled mode.The experimental results show that under the strain-controlled loading mode,the ZG20SiMn cast steel can exhibit the cyclic strain hardening and cyclic stability,which mainly depends on the imposed total strain amplitude.For the ZG20SiMn cast steel,the relation between the reversals to failure and the elastic strain amplitude or plastic strain amplitude shows a single slope of linear behavior,respectively.The analysis results with transmission electron microscope (TEM)reveal that the fatigue deformation mechanism of ZG20SiMn cast steel is the wavy slip mechanism.The analysis results on the fatigue fracture surfaces of ZG20SiMn cast steel with scanning electron microscope (SEM)reveal that at different total strain amplitudes,the fatigue cracks initiate at the free surface of fatgiue specimen in a transgranular mode,and then propagate in a transgranular mode.
Keywords：ZG20SiMn cast steelstrain fatiguefatigue lifefatigue deformationfatigue fracturecyclic stress responsedeformation mechanismwavy slip
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 657-661 )