Low energy electroplasticity in aluminum alloys

Here, we report a low energy electroplasticity event in alloyed aluminum (Al7050) at a much lower current (0.035A/mm2) than the previously reported threshold of ~10A/mm2, leading to 10% hardness reduction and 38% creep enhancement. Ab-initio calculations unveiled a reduced energy barrier to dislocat...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2020-11, Vol.798, p.140235, Article 140235
Main Authors: Bumgardner, Clifton H., Croom, Brendan P., Song, Ningning, Zhang, Yunya, Li, Xiaodong
Format: Article
Language:English
Subjects:
Alloying elements
Aluminum
Aluminum alloys
Aluminum base alloys
Creep (materials)
Density functional theory (DFT)
Dislocation mobility
Low energy electroplasticity
Nanoindentation
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Summary:Here, we report a low energy electroplasticity event in alloyed aluminum (Al7050) at a much lower current (0.035A/mm2) than the previously reported threshold of ~10A/mm2, leading to 10% hardness reduction and 38% creep enhancement. Ab-initio calculations unveiled a reduced energy barrier to dislocation motion with the presence of alloying elements. [Display omitted]
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2020.140235