Abstract

The work reviews the research and development status of magnesium alloy, with more attention to the methodologies and technologies adopted to improve the properties of AZ91 alloy. The drive force of utilizing magnesium alloys for automotive and biomedical application is light weightiness and biocompatibility respectively. However, the softness and high activity of magnesium alloys result in high wear and high corrosion rate respectively. One of the essential factors influencing the properties of magnesium alloy is its microstructure. Consequently, the grain size, morphology and distribution of phase constituents influence the properties of magnesium alloys. The modification of microstructure through processing route (hot working and cold working), heat treatment, and alloying elements improves the mechanical, corrosion, biocompatible, and tribological properties of magnesium alloys. Besides microstructural modification processes, addition of reinforcements, and coatings improves the properties of magnesium alloys. This article emphasis on the recent research on the technologies to improve the microstructure, hardness, tensile strength, ductility, yield strength, wear resistance, and corrosion resistance of magnesium alloy AZ91. Moreover, this review addresses the key issues hindering the applications of magnesium alloys for structural and biomedical applications.

Graphic Abstract

摘要

这项工作回顾了镁合金的研究和发展状况，更多地关注了用于改善AZ91合金性能的方法和技术。将镁合金用于汽车和生物医学应用的驱动力分别是重量轻和生物相容性。然而，镁合金的柔软性和高活性分别导致高磨损和高腐蚀速率。影响镁合金性能的重要因素之一是其微观结构。因此，相成分的晶粒尺寸，形态和分布会影响镁合金的性能。通过加工路线（热加工和冷加工），热处理和合金元素对微观结构的修改可改善机械，腐蚀，生物相容性，和镁合金的摩擦学性能。除微结构改性工艺外，添加增强材料和涂层还改善了镁合金的性能。本文着重于对改善镁合金AZ91的显微组织，硬度，拉伸强度，延展性，屈服强度，耐磨性和耐蚀性的技术的最新研究。此外，本综述解决了阻碍镁合金在结构和生物医学应用中应用的关键问题。镁合金AZ91的耐磨性和耐腐蚀性。此外，本综述解决了阻碍镁合金在结构和生物医学应用中应用的关键问题。镁合金AZ91的耐磨性和耐腐蚀性。此外，本综述解决了阻碍镁合金在结构和生物医学应用中应用的关键问题。

图形摘要