Li Y., Tang X., 2017, Study on Fatigue Fracture Mechanism of High Strength TRIP600 Steel for Automobile
, Chemical Engineering Transactions, 62, 661-666.
The purpose of this paper was to carry out a series of fatigue tests on a 1.5 mm thick TRIP600MP steel plate. The test data were fitted and the fatigue behaviour was observed by a scanning electron microscope. The test results showed that the fatigue limit of TRIP600 steel plate was 460 MPa under a condition of high cyclic tensile fatigue test with a load frequency of 8 Hz and R=0. The empirical formula of SN curve fitting was lgN=51.1625-16.8574lgσ. The result revealed that the fatigue source of steel plate was mostly under the surface. The principal conclusions were that the extension of the crack was a ductile fracture and the fault zone was brittle fracture.
