Study on low cycle fatigue properties of high manganese steel under different strain amplitudes
YANG Yang
HOU Yong-chao
SHI Xin-sheng
CHEN Yong-jia
LI Chen
ZHU Meng-qi
Abstract：In this paper,the tensile and low cycle fatigue tests of high manganese steel casting(120Mn13)were carried out at room temperature.The dynamic strain aging in tensile deformation,cyclic stress-strain be-havior,cyclic hardening and softening behavior and crack propagation behavior under tension and compression fatigue deformation were studied.The results shown:low-frequency A-type peak sawtooth and shaped high-fre-quency B-type ripple sawtooth were found in the tensile curve,which represented dynamic strain aging.In the low cycle fatigue experiments under different strain amplitudes,the samples were first cycle hardened,and then cycle softened until fracture.With increasing strain amplitude,the maximum cyclic tensile stress increased gradually,but the fatigue life decreased.The cracks under high strain amplitude mostly propagated along the grain boundary,but the number of crack deflection and secondary cracks increased,which was the key reason for the little difference in fatigue life compared low strain amplitude.
Keywords：high manganese steeltensile behaviorlow cycle fatiguedeformed microstructurecrack propagation
Publication Date：2023-11-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 42-47 )