Effects of Silicon, Chromium, and Copper on Kinetic Parameters of Precipitation during Tempering of Medium Carbon Steels

0542559 - ÚJF 2022 RIV CH eng J - Journal Article
Gokhman, A. - Nový, Z. - Salvetr, P. - Ryukhtin, Vasil - Strunz, Pavel - Motyčka, P. - Zmeko, J. - Kotous, J.
Effects of Silicon, Chromium, and Copper on Kinetic Parameters of Precipitation during Tempering of Medium Carbon Steels.
Materials. Roč. 14, č. 6 (2021), č. článku 1445. E-ISSN 1996-1944
Research Infrastructure: Reactors LVR-15 and LR-0 II - 90120
Institutional support: RVO:61389005
Keywords : medium carbon steel * microstructure * tempering * SANS
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.748, year: 2021
Method of publishing: Open access
https://doi.org/10.3390/ma14061445

Understanding the tempering behavior of medium carbon steels is mandatory if their mechanical properties are to be improved. For an optimal technology to be developed for this purpose, a substantial experimental basis is needed to extract quantitative information on the microstructure of the tempered material. This paper reports on the characterization of microstructural changes induced by tempering in medium-carbon steels alloyed with Si, Cr, Cu, and Mn using state-of-the-art experimental techniques. Complementarities among these techniques are highlighted. The evolution of transition carbides, cementite, and copper precipitates is described using data from X-ray diffraction, small and ultra-small angle neutron diffraction, transmission electron microscopy, and dilatometry observation. The effects of silicon, chromium, and copper on the mechanism of carbide and copper precipitation are discussed. The considerable changes found in the size and volume of copper precipitates correlate well with the difference in the yield stress between tempered steels with and without copper.
Permanent Link: http://hdl.handle.net/11104/0319946