Abstract
Cerium is a promising alloying element that may improve the mechanical properties of aluminum-based alloys. However, the effect of Ce on the microstructural and mechanical behavior of complex-alloyed aluminum-based alloys has not been studied well. In this work, we have analyzed the effect of Ce and Fe co-addition on the phase structure, grain structure, and tensile characteristics of the Al-Mg alloy at ambient and elevated temperatures. X-ray and microstructural studies involving scanning electron and transmission electron microscopy methods have been used in order to identify the phase composition of the Al-Mg-Fe-Ce alloy. Two Ce-bearing constituent phases have been identified and their morphology has been analyzed. Uniaxial tensile test experiments were used to study the mechanical characteristics of the samples processed by simple thermomechanical treatment. The Ce- and Fe-modified alloy exhibits fine-grained structure and superplasticity at sub-solidus temperatures, increased yield strength, and good room temperature ductility.
Published Version
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