Optimization of a Solution Treatment in the Al-Cu-Mg-Ag Alloy via a Microstructural Investigation

We investigated the effect of solution temperature (T-sol. = 440-530 degrees C) on the mechanical properties of the Al-3.4Cu-0.34Mg-0.3Mn-0.17Ag alloy, finding that the investigated Al alloy showed the highest mechanical strength of sigma(UTS) = ~329 MPa at a T-sol. value of 470 degrees C. The microstructural investigation demonstrates that the mechanical properties for different T-sol. values stem from grain growth, precipitation hardening, and the formation of large particles at the grain boundaries. On the basis of T-sol. = 470 degrees C, the effect of each microstructural evolution is significantly different on the mechanical properties. In this study, the relationships between the microstructural evolution and the mechanical properties were investigated with respect to different values of T-sol.

Automated summary

The effect of solution temperature (T-sol. = 440-530 degrees C) on the mechanical properties of Al-3.4Cu-0.34Mg-0.3Mn-0.17Ag alloy was investigated. It was found that the alloy showed the highest mechanical strength of sigma(UTS) = ~329 MPa at a T-sol. value of 470 degrees C. The microstructural investigation revealed that the different mechanical properties at different T-sol. values were attributed to grain growth, precipitation hardening, and the formation of large particles at the grain boundaries. The relationships between the microstructural evolution and the mechanical properties were explored with respect to different values of T-sol.