Microstructural Features and Properties of Al-Cu-Mg Alloy Containing Silver and Cerium

Abstract:

The article presents the results of an investigation of microstructural features and mechanical characteristics of Al-5.0Cu-0.5Mg alloy containing up to 0.4 wt. % Ag and up to 0.1 wt. % Ce. The experiment was conducted using optical microscopy, Scanning Electron Microscopy as well as an electron probe micro-analyzer and Differential Scanning Calorimetry. Samples in cast condition and after heat treatment were examined. The melting temperatures of non-equilibrium eutectics (non-equilibrium solidus), equilibrium solidus and liquidus were determined. The optimal temperature of the homogenizing heat treatment was determined, which was 500°C. Using this heat treatment mode resulted in the elimination of dendritic segregation and complete dissolution of silver in aluminum. Injection of cerium into the Al-Cu-Mg-Ag system during crystallization of the melt is accompanied by the formation of a coarse four-component phase, which has the morphology of polyhedrons, is on the grain boundaries. The estimation of the relation between microstructure characteristics and mechanical properties of the alloy has been made.

• Periodical: Solid State Phenomena (Volume 316)
• Pages: 533-537
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.316.533
• Online since: April 2021
• Authors: Pavel L. Reznik*, Boris V. Ovsyannikov
• Keywords: Ag, Ce, Crystallization, EPMA, Heat Treatment, Microstructure, Phase Composition

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