Effect of cold rolling and annealing temperature on structure, hardness and electrical conductivity of rapidly solidified alloy of Al-Cu-Mn-Zr system

The experimental heat resistant alloy Al-3.3Cu-2.5Mn-0.5Zr (wt. %) has been manufactured using the method of electromagnetic casting (EMC) providing solidification at an ultra-high rate (-104 degrees C/s). The microstructure, phase composition, mechanical and electrical properties of the alloy in as-cast state and after cold rolling followed by annealing has been extensively studied using both thermodynamic calculations and experimental analysis. The microstructure of the as-cast EMC rod consists of the fine Al2Cu phase inclusions and aluminum matrix where all Mn and Zr and most of Cu are dissolved. The annealing of cold rolled strip at 400 degrees C allows reaching the optimal combination of strength, electrical conductivity and thermal stability.

Automated summary

An experimental heat resistant alloy has been manufactured using electromagnetic casting, achieving an optimal combination of strength, electrical conductivity and thermal stability after cold rolling and annealing. The microstructure, phase composition, mechanical and electrical properties of the alloy have been extensively studied through both thermodynamic calculations and experimental analysis.