Journal Article

Effect of alloying elements on thermal conductivity of aluminum

Zhang, Ailing, Li, Yanxiang

2023

Overview

The thermal conductivity of aluminum alloys is mainly influenced by alloying elements, including their species, content, and existing state, but the influence level of each factor is not quantified. In this work, we propose a quantitative relationship between the thermal conductivity of aluminum alloys and alloying elements based on the theory of thermal conductivity of metals. The results demonstrate the weakening order of alloying elements in solid solution on thermal conductivity of aluminum is Cr > V > Mn > Ti > Zr > Si > Mg > Cu > Zn, which relates to the difference of outer electronic structure and atom radii. Besides, the weakening effect of alloying elements in the solid solution is much more significant than in precipitated state. Furthermore, the synergistic effect of Si, Mg, and Cu on thermal conductivity is unequal to the sum of effects of each alloying element in Al–Si–Mg and Al–Si–Cu alloys. Graphical abstract

• Publisher: Springer International Publishing,Springer Nature B.V
• Subject: Alloying effects / Alloying elements / Alloys / Aluminum alloys / Aluminum base alloys / Applied and Technical Physics / Biomaterials / Chemistry and Materials Science / Conductivity / Copper / Copper base alloys / Electronic structure / Heat conductivity / Heat transfer / Inorganic Chemistry / Magnesium / Materials Engineering / Materials Science / Mechanical properties / Nanotechnology / Silicon / Solid solutions / Synergistic effect / Tensile strength / Thermal conductivity / Zirconium