Martynenko Natalia, Anisimova Natalia, Rybalchenko Olga, Kiselevskiy Mikhail, Rybalchenko Georgy, Tabachkova Natalia, Zheleznyi Mark, Temralieva Diana, Bazhenov Viacheslav, Koltygin Andrey, Sannikov Andrey, Dobatkin Sergey
A.A. Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences, Leninskiy Prospect, 49, 119334 Moscow, Russia.
Center for Biomedical Engineering, National University of Science and Technology "MISIS", 119049 Moscow, Russia.
Materials (Basel). 2022 Dec 19;15(24):9073. doi: 10.3390/ma15249073.
The effect of high-pressure torsion (HPT) on the microstructure, phase composition, mechanical characteristics, degradation rate, and bioactive properties of the Zn-1%Mg alloy is studied. An ultrafine-grained (UFG) structure with an average grain size of α-Zn equal to 890 ± 26 nm and grains and subgrains of the MgZn and MgZn phases with a size of 50-100 nm are formed after HPT. This UFG structure leads to an increase in the ultimate tensile strength of the alloy by ~3 times with an increase in elongation to 6.3 ± 3.3% due to the formation of a basal texture. The study of corrosion resistance did not show a significant effect of HPT on the degradation rate of the alloy. In addition, no significant changes in the bioactivity of the alloy after HPT: hemolysis, cellular colonization and growth inhibition.
研究了高压扭转（HPT）对Zn-1%Mg合金的微观结构、相组成、力学性能、降解速率和生物活性的影响。经过HPT处理后，形成了平均晶粒尺寸为890±26nm的α-Zn超细晶粒（UFG）结构以及尺寸为50-100nm的MgZn和MgZn相的晶粒和亚晶粒。由于形成了基面织构，这种UFG结构使合金的极限抗拉强度提高了约3倍，同时伸长率提高到6.3±3.3%。耐腐蚀性研究表明，HPT对合金的降解速率没有显著影响。此外，HPT处理后合金的生物活性没有显著变化：溶血、细胞定植和生长抑制。
