Effect of Heat Treatment on the Mechanical and Corrosion Properties of Mg–Zn–Ga Biodegradable Mg Alloys
Viacheslav Bazhenov,
Anastasia Lyskovich,
Anna Li,
Vasily Bautin,
Alexander Komissarov,
Andrey Koltygin,
Andrey Bazlov,
Alexey Tokar,
Denis Ten,
Aigul Mukhametshina
Affiliations
Viacheslav Bazhenov
Casting Department, National University of Science and Technology “MISiS”, 119049 Moscow, Russia
Anastasia Lyskovich
Casting Department, National University of Science and Technology “MISiS”, 119049 Moscow, Russia
Anna Li
Laboratory of Hybrid Nanostructured Materials, National University of Science and Technology “MISiS”, 119049 Moscow, Russia
Vasily Bautin
Department of Metallurgy Steel, New Production Technologies and Protection of Metals, National University of Science and Technology “MISiS”, 119049 Moscow, Russia
Alexander Komissarov
Laboratory of Hybrid Nanostructured Materials, National University of Science and Technology “MISiS”, 119049 Moscow, Russia
Andrey Koltygin
Casting Department, National University of Science and Technology “MISiS”, 119049 Moscow, Russia
Andrey Bazlov
Laboratory of Advanced Green Materials, National University of Science and Technology “MISiS”, 119049 Moscow, Russia
Alexey Tokar
Laboratory of Hybrid Nanostructured Materials, National University of Science and Technology “MISiS”, 119049 Moscow, Russia
Denis Ten
Laboratory of Hybrid Nanostructured Materials, National University of Science and Technology “MISiS”, 119049 Moscow, Russia
Aigul Mukhametshina
Laboratory of Hybrid Nanostructured Materials, National University of Science and Technology “MISiS”, 119049 Moscow, Russia
Mg alloys have mechanical properties similar to those of human bones, and have been studied extensively because of their potential use in biodegradable medical implants. In this study, the influence of different heat treatment regimens on the microstructure and mechanical and corrosion properties of biodegradable Mg–Zn–Ga alloys was investigated, because Ga is effective in the treatment of disorders associated with accelerated bone loss. Solid–solution heat treatment (SSHT) enhanced the mechanical properties of these alloys, and a low corrosion rate in Hanks’ solution was achieved because of the decrease in the cathodic-phase content after SSHT. Thus, the Mg–4 wt.% Zn–4 wt.% Ga–0.5 wt.% Y alloy after 18 h of SSHT at 350 °C (ultimate tensile strength: 207 MPa; yield strength: 97 MPa; elongation at fracture: 7.5%; corrosion rate: 0.27 mm/year) was recommended for low-loaded orthopedic implants.
