Low energy electroplasticity in aluminum alloys

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:798

Article

Bumgardner, Clifton H.¹  Croom, Brendan P.^1,2  Song, Ningning¹  Zhang, Yunya¹  Li, Xiaodong¹ 

[1] Univ Virginia, Dept Mech & Aerosp Engn, 122 Engineers Way, Charlottesville, VA 22904 USA

[2] US Air Force, Res Lab, Mat & Mfg Directorate, Dayton, OH USA

关键词: Low energy electroplasticity;    Density functional theory (DFT);    Nanoindentation;    Dislocation mobility;    Aluminum alloys;   

DOI  :  10.1016/j.msea.2020.140235

来源: Elsevier

【 摘 要 】

Here, we report a low energy electroplasticity event in alloyed aluminum (Al7050) at a much lower current (0.035 A/mm(2)) than the previously reported threshold of similar to 10 A/mm(2), 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.

【 授权许可】

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