We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Structure, Phase Composition, and Mechanical Properties of a High Strength Steel with Transition Carbide η-Fe<sub>2</sub>C.
- Authors
Borisova, Yu. I.; Mishnev, R. V.; Tkachev, E. S.; Kniaziuk, T. V.; Gaidar, S. M.; Kaibyshev, R. O.
- Abstract
The effects of quenching and tempering on the structure, phase composition, and mechanical properties of the Fe–0.34C high strength steel with 1.77 wt % Si are studied. The tempering at temperatures up to 500°C barely has an effect on the structural characteristics of packet martensite formed during quenching. The precipitation of intermediate (transition) η-carbide particles at tempering temperatures in the range of 200–400°C leads to increases in the yield strength to 1490 MPa and in the impact toughness to 35 J/cm2. The determined temperature of the ductile–brittle transition of the steel tempered at 200°C is about –50°C. A decrease in the impact toughness and a decrease in the proportion of ductile fracture with a decrease in the test temperature are accompanied by a transition from transgranular to intergranular fracture. The precipitation of cementite particles along the boundaries of the laths and blocks is observed after tempering at 500°C. This leads to a decrease in the yield strength, while the impact toughness of the steel remains unchanged.
- Subjects
HIGH strength steel; DUCTILE fractures; CEMENTITE; MARTENSITE; CARBIDES; TRANSITION temperature
- Publication
Physics of Metals & Metallography, 2023, Vol 124, Issue 12, p1319
- ISSN
0031-918X
- Publication type
Article
- DOI
10.1134/S0031918X23602445