Ex-situ and in-situ investigations of the microstructural evolution of AA6082 aluminum alloy during heat treatment

Lypchanskyi O, Rigas N, Korpala G, Merklein M, Prahl U (2023)

Publication Type: Journal article

Publication year: 2023

Journal

Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing Elsevier

Article Number: 144828

Journal Issue: 870

URI: https://www.sciencedirect.com/science/article/abs/pii/S0921509323002526?via=ihub

DOI: 10.1016/j.msea.2023.144828

Open Access Link: https://www.sciencedirect.com/science/article/abs/pii/S0921509323002526

Abstract

The present study investigated the microstructural evolution of AA6082 aluminum alloy using ex-situ and in-situ methods. Microstructural characterization was performed for the individual steps of the heat treatment parameters. To identify the morphology and kinetics of changes in precipitation and grain, the microstructure of the alloy was examined using scanning electron microscopy/electron backscatter diffraction in combination with energy dispersive X-ray spectrometry. Analysis of the microstructural changes revealed coarser β-Mg2Si nucleation and growth activity, but it showed no changes related to grain growth or α-Al(FeMn)Si precipitation activity. Additionally, the formation of rod-shape β' precipitates was evaluated. Higher temperature promoted the growth and increase in length of β' rods and the appearance of β' rods outside of contact with the intermetallic precipitation. The influences of different isothermal holding temperatures on the relative change in signal velocity generated by a laser ultrasonics for metallurgy (LUMet) system were evaluated. The strong correlation between the findings of microstructural analysis and the results derived from ultrasonic measurement confirmed the efficacy of the novel in-situ model test for predicting microstructural changes.

Authors with CRIS profile

Nikolaos Rigas Institute of Manufacturing Technology Marion Merklein Institute of Manufacturing Technology

Additional Organisation(s)

Institute of Manufacturing Technology

Related research project(s)

Manufacturing of tailored aluminum parts by controlling the local cooling rates in a combined forming, quenching and hardening process (Tailor Quenched Forming) Jan. 1, 2022 - Dec. 31, 2023

Involved external institutions

Technische Universität Bergakademie Freiberg DE Germany (DE)

How to cite

APA:

Lypchanskyi, O., Rigas, N., Korpala, G., Merklein, M., & Prahl, U. (2023). Ex-situ and in-situ investigations of the microstructural evolution of AA6082 aluminum alloy during heat treatment. Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 870. https://dx.doi.org/10.1016/j.msea.2023.144828

MLA:

Lypchanskyi, Oleksandr, et al. "Ex-situ and in-situ investigations of the microstructural evolution of AA6082 aluminum alloy during heat treatment." Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 870 (2023).

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