Mechanical and Microstructural Characterization of an AlCuAg Alloy

Ángel A. Coutiño-Martínez1, José Amparo Rodríguez-García1, Carlos Adrián Calles-Arriaga1, José A. Castillo-Robles1, Wilian Jesús Pech-Rodríguez1, José Guadalupe Miranda-Hernández2 and Enrique Rocha-Rangel1

Affiliation:

1 Universidad Politécnica de Victoria, Av. Nuevas Tecnologías 5902, Ciudad Victoria, Tamaulipas, 87138, México 2 Centro Universitario UAEM Valle de México, Atizapán de Zaragoza, Estado de México,54500, México erochar@upv.edu.mx

DOI:

https://doi.org/10.23939/chcht20.01.001

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Keywords:

alloys

multicomponent

medium entropy alloys

AlCuAg

Abstract:

Aluminum alloys are widely used in the automotive and aeronautical industries due to their good mechanical properties, high corrosion resistance, and low weight. In this study, an aluminum-based medium-entropy alloy was fabricated by adding copper and silver. The alloy composition consisted of 97 wt.% aluminum, with 1.5 wt.% copper and 1.5 wt.% silver. The processing technique was carried out using the powder metallurgical route. After the sintering phase, different thermal aging treatments were conducted to improve the aluminum alloy's mechanical properties. Heat treatments were performed at different times and temperatures. The results revealed a microstructure with very fine grain sizes, consisting of two phases: an α-solid solution matrix with a composition close to the nominal alloy, and an intermetallic β-phase composed of dispersed, copper-rich AlCuAg precipitates.

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Mechanical and Microstructural Characterization of an AlCuAg Alloy

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