Many-body interactions in the Al-Cu system.

Area of Science:

• Materials Science
• Computational Materials Science
• Alloy Physics

Background:

• Guinier-Preston zones are crucial for strengthening Al-Cu alloys.
• Understanding the underlying many-body interactions is key to controlling alloy properties.
• Previous studies have explored Guinier-Preston zones, but detailed interaction data is needed.

Purpose of the Study:

• To provide comprehensive computational data on many-body interactions in Al-Cu alloys.
• To support research on the stabilization mechanisms of Guinier-Preston zones.
• To offer a resource for further theoretical and experimental investigations.

Main Methods:

• Utilizing the Projector Augmented-Wave (PAW) method combined with the Vienna Ab initio Simulation Package (VASP) for calculations.
• Performing first-principles electronic structure calculations.
• Analyzing pairwise, three-site, and four-site interaction energies.

Main Results:

• Detailed computational data for various many-body interactions in Al-Cu alloys.
• Quantification of interaction strengths at different atomic configurations.
• Data consistent with the stabilization mechanisms discussed in Gorbatov et al. (2017).

Conclusions:

• The generated data provides a fundamental resource for Al-Cu alloy research.
• This data can aid in the design and prediction of alloy behavior.
• Further studies can leverage this information to explore alloy phase stability and precipitation kinetics.