چكيده به لاتين
Biodegradable magnesium-based implants have gained significant attention due to the need for improved mechanical properties, controlled fatigue resistance, and reduced corrosion rates in biological environments. Due to its high strength-to-density ratio and an elastic modulus similar to that of bone, magnesium is an ideal choice for orthopedic applications. However, its rapid corrosion in body environments necessitates optimizing alloy compositions. In this regard, Mg-Zn-Ca alloys, with the addition of calcium and zinc, improve corrosion resistance and mechanical properties. There are limited studies on fatigue performance in air and simulated body fluid environments. This research aims to comprehensively evaluate the fatigue, mechanical, and corrosion properties of Mg-2Zn-xCa (x = 0, 0.35, 0.7, 1) alloys to identify the most suitable composition for medical applications. selecting the appropriate alloy by taking into account specific clinical requirements, loading conditions, grain size, hardness, and environmental factors can ensure optimal performance in medical applications. The Mg-2Zn-0.35Ca alloy, with 0.35% calcium content, exhibited superior performance under static loading combined with corrosion in this study. In contrast, the Mg-2Zn-1Ca alloy showed the lowest corrosion resistance due to the formation of unstable phases, such as Mg2Ca, which degrade rapidly in biological environments. Nevertheless, thanks to its excellent fatigue behavior, it was identified as the most suitable composition for fatigue-corrosion applications in this research. However, this alloy exhibits excellent fatigue behavior, making it the most suitable composition for this study outcome in fatigue-corrosion applications.
