Magnesium (Mg) alloys have received a significant interest in the past 20 years, owing to a nonlinearly increasing demand for lightweight structural materials. Magnesium extrusions alloys to date have had lower industrial uptake than their counterpart aluminium extrusion alloys, predominantly due to lower extrudability and formability, tension-compression yield asymmetry and no clear advantage in the specific strength. Any improvement in extrusion alloy properties requires a better understanding of the effects of alloy composition and processing conditions; and how these dictate the final alloy microstructure. This review sheds insightful information on the processing–microstructure–property relationships of extruded magnesium alloys. Historical and recent progress in magnesium extrusion alloys is critically reviewed, including the advances in extrudability, mechanical properties and microstructural characterisation. The challenges associated with the ‘gap’ in properties between the magnesium and aluminium extrusion alloys are identified, and prospects discussed regarding the development of high performance magnesium extrusion alloys.

中文翻译：

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镁挤压合金：发展和前景回顾

在过去的20年中，由于对轻质结构材料的需求呈非线性增长，镁（Mg）合金引起了人们的极大兴趣。迄今为止，镁挤压合金的工业吸收性比铝挤压合金低，这主要是由于较低的可挤压性和可成形性，拉伸压缩屈服不对称性以及比强度没有明显优势。挤压合金性能的任何改善都需要对合金成分和加工条件的影响有更好的了解；以及这些因素如何决定最终的合金显微组织。这篇评论为挤压镁合金的加工，微观结构和性能之间的关系提供了有见地的信息。对镁挤压合金的历史和最新进展进行了严格的审查，包括可挤出性，机械性能和微观结构表征方面的进展。确定了与镁和铝挤压合金之间的性能“差距”相关的挑战，并讨论了有关高性能镁挤压合金发展的前景。