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Investigating the Effect of Aging Temperature, Magnesium, and Silicon Content on the Hardness of A6063 Alloy

Year: 2025

Type: article

Abstract: This research investigated the magnesium (Mg), silicon (Si) content, and aging temperature's effect on the microstructure and hardness of Al-Mg-Si alloys using Response Surface Methodology (RSM). The study varied Mg content between 0.4% and 1%, Si content from 0.4% to 0.8%, and aging temperatures between 170 °C to 210 °C. The findings revealed that increasing the Mg content from 0.85% to 1% and optimizing aging temperatures between 180 °C and 195 °C significantly improved hardness, primarily due to the enhanced formation of magnesium silicide precipitates (Mg2Si). In contrast, lower Mg levels of 0.4%, Si content below 0.42%, or aging temperatures lower than 170 °C or higher than 200 °C resulted in reduced hardness. This reduction in hardness is linked to the limited precipitation of Mg2Si, which diminishes the obstacles to dislocation movement.

Source: Diffusion Foundations and Materials Applications

DOI: 10.4028/p-om12i7

Authors: Mohammed J. Alshibli, Mohamed Abdelgawad Gebril, Farag M. Shuaeib

Institution: University of Benghazi

Language: English

Topic: Aluminum Alloy Microstructure Properties

Subfield: Aerospace Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

OpenAlex ID: W4408634953

FWCI:

Cites: 34

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Related to: 10