Enhanced Coarsening Resistance of Q-phase in Aluminum alloys by the addition of Slow Diffusing Solutes

Enhanced Coarsening Resistance of Q-phase in Aluminum alloys by the addition of Slow Diffusing Solutes

Here, we design thermally stable microstructures of Al3Cu2Mg9Si7 (Q) precipitates based on commercial aluminum alloy (AS7GU) for automotive applications utilizing low-diffusivity solutes in aluminum. We find that the newly developed alloys show a ~ 20% enhancement in mechanical properties at 300 °C...

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Veröffentlicht in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2018-09, Vol.735 (C), p.318-323
Hauptverfasser: Kim, Kyoungdoc, Bobel, Andrew, Baik, Sung-Il, Walker, Mike, Voorhees, P.W., Olson, G.B.
Format: Artikel
Sprache:eng
Schlagworte:
Alloy development
Aluminum alloys
Aluminum base alloys
Atom-Probe Tomography (APT)
Coarsening
Diffusion rate
Materials Science
Mechanical properties
Mechanical strength
Metallurgy & Metallurgical Engineering
Precipitates
Q-phase precipitates
Science & Technology - Other Topics
Tensile strength
Thermal stability
Transmission electron microscopy
Transmission-Electron Microscopy (TEM)
Weight reduction
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Zusammenfassung:Here, we design thermally stable microstructures of Al3Cu2Mg9Si7 (Q) precipitates based on commercial aluminum alloy (AS7GU) for automotive applications utilizing low-diffusivity solutes in aluminum. We find that the newly developed alloys show a ~ 20% enhancement in mechanical properties at 300 °C compared to the baseline AS7GU alloy.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2018.08.059