S. V. Gladkovsky, I. S. Kamantsev, V. E. Veselova, Yu. V. Khudorozhkova

MARTENSITIC TRANSFORMATIONS IN PLASTIC AND FRACTURE ZONES OF THE 05G20S2 METASTABLE STEEL DURING CYCLIC TESTS

X-ray diffraction analysis, EBSD technique, and transmission electron microscopy are used to reveal the features of phase and microstructural transformations developing in plastic strain and fracture zones of the 05G20S2 metastable steel (Fe-20Mn-2Si). The dependence of the phase composition of the steel on the fatigue fracture surface on the value range of the stress intensity coefficient at the fatigue crack tip is determined.

Acknowledgment: The work was performed according to the state assignment for the IES UB RAS, theme No. AAAA-A18-118020790148-1. We express our gratitude to M. S. Khadyev, Ph.D., A. S. Patselov, and S. N. Sergeev for their assistance in conducting microstructural studies and X-ray diffraction analysis. Our thanks are also due to Prof. Yu. N. Simonov head of the Department of MHT PNRPU, for the opportunity to use the licensed SIAMS-700 program for quantitative metallographic analysis.

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