Effect of the Structural-Phase State of Biodegradable Alloys Zn–1% Mg and Zn–1% Mg–0.1% Ca on Their Mechanical and Corrosion Properties

• Published in: Russian metallurgy Metally 2022-11, Vol.2022 (11), p.1414-1421
• Main Authors: Martynenko, N. S., Rybal’chenko, O. V., Rybal’chenko, G. V., Ogarkov, A. I., Bazhenov, V. E., Koltygin, A. V., Belov, V. D., Dobatkin, S. V.
• Format: Article
• Language: English
• Subjects: Aging; Aging (metallurgy); Annealing; Biodegradability; Calcium; Chemistry and Materials Science; Corrosion effects; Corrosion resistance; Magnesium base alloys; Materials Science; Mechanical properties; Medical materials; Metallic Materials; Microstructure; Plastic properties; Ultimate tensile strength; Zinc
• ISSN: 0036-0295; 1555-6255; 1531-8648
• DOI: 10.1134/S0036029522110088

—The effect of the microstructure of Zn–1% Mg and Zn–1% Mg–0.1% Ca alloys after treatment under various conditions (casting, annealing, aging) on their mechanical and corrosion properties has been studied. The addition of calcium is shown not to degrade the strength and corrosion properties of the Zn–1% Mg alloy. The change in the microstructure of the alloys during annealing and aging significantly affect their corrosion resistance and mechanical characteristics. For example, annealing of both alloys leads to an increase in their corrosion resistance and a decrease in the ultimate tensile strength and plasticity at a simultaneous increase in the yield strength. Subsequent aging at 150°C for 1 h slightly decreases the corrosion characteristics and causes further softening of the alloys at a slight increase in their plasticity. Our results demonstrate that, for the alloys under study to be successfully used as medical materials, they should be subjected to deformation treatment in order to increase their strength and plasticity as a result of microstructural and textural transformations.