Relationship Between Structure and Functional Properties of Ultrafine-Grained Fe-Mn-Si Alloys for Temporary Implants
Year: 2025
Type: article
Abstract: This paper presents a study of microstructure formation in bioresorbable Fe-Mn-Si alloys for temporary implants under high-pressure torsion (HPT) at room temperature and at 300 °C. The effect of silicon on the mechanism of microstructure formation under HPT and, as a consequence, on the mechanical, corrosion and biological properties of the alloys is studied. It is established that Si promotes martensitic transformation. HPT leads to an increase in the microhardness values of the studied alloys from ~1560 MPa in the initial state to ~5500 MPa (160–560 HV) due to structure refinement and phase transformation. An increase in the electrochemical corrosion rate of Fe-Mn-Si alloys to ~0.5 mm/year is established due to grain refinement to nanosize and the formation of strain-induced martensite. In vitro cytotoxicity and induced hemolysis studies showed that Fe-Mn, Fe-Mn-3.7Si, and Fe-Mn-5Si alloys after annealing and HPT can be characterized as biocompatible.
Source: Crystals
Institutions: Russian Academy of Sciences, Baikov Institute of Metallurgy and Materials Science, National University of Science and Technology, Russian Cancer Research Center NN Blokhin, Ministry of Health of the Russian Federation, P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Prokhorov General Physics Institute, Belgorod National Research University, Liaoning Academy of Materials
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,534
Funder: Russian Science Foundation
Award: G3097370394
OpenAlex ID: W4409966116