Breaking the trade-off between thermal conductivity and strength of magnesium alloys: Mechanisms and strategies

Mg-based structural materials, known for their lightweight properties and excellent thermal conductivity, have significant potential in applications requiring efficient heat dissipation, especially in the information age. However, a trade-off exists between the mechanical properties and thermal conductivity of these materials. Strengthening techniques such as solution strengthening, dislocation strengthening, grain boundary strengthening, and second-phase strengthening can improve mechanical properties but typically degrade thermal conductivity. This trade-off presents a major challenge in the development of Mg-based materials that simultaneously offer high mechanical strength and thermal conductivity. This review explores the mechanisms and strategies for enhancing the thermal conductivity of Mg-based structural materials, including tailoring alloying elements, depleting matrix solutes, designing composite structure, tailoring texture, and regulating the morphology of the second phase. This will provide insights into the future development of Mg materials.