Pseudoelastic and corrosion behaviors of Mg ZEK100 alloy under cyclic loading

Abstract

Magnesium alloys, which possess excellent mechanical properties and unique biocompatibility and biodegradability, are newly developed as load-bearing orthopedic implant biomaterials. This paper focuses on the pseudoelasticity of Mg ZEK100 alloy under cyclic tensile loading–unloading at a fixed cyclically incremental strain as well as the effect of precorrosion times on the mechanical response of the material. The results show that under cyclic loading–unloading, Mg ZEK100 alloy exhibits an obvious pseudoelastic behavior. The effect of increasing stress or plastic strain on the apparent elastic modulus and anelastic strain is nonlinear and nonmonotonic. After corrosion, the mechanical properties deteriorate significantly.