Rare Earth Magnesium Alloys Advance Strength and Corrosion Resistance: Chinese Researchers Map Path to High-Performance Lightweight Metals

Highlights

• Researchers from Shanghai Jiao Tong University, AVIC Chengdu Aircraft, and Beijing Institute of Aeronautical Materials reviewed rare earth-enhanced magnesium alloys.
• Rare earth additions including Gd, Y, Dy, Nd, Er, Sm, and Sc can improve grain structure, precipitation, and corrosion behavior in magnesium alloys.
• One reviewed Mg-Gd-Y-Zn-Mn alloy achieved 525 MPa ultimate tensile strength and 420 MPa yield strength through advanced microstructural mechanisms.
• A key scientific gap remains: how rare earths influence the formation and damage of protective corrosion-product films is still insufficiently understood.
• China's rare earth strategy extends far beyond mining into downstream materials science, giving it a compounding advantage in aerospace, automotive, and electronics manufacturing.