Mechanical properties of Bʹ precipitates and fracture behavior of Bʹ/Al interface in Al-Mg-Si alloys: A first-principle calculation study

Yanli Lu,Shiyao Zhang,Yifan Wang,Zheng Chen

Applied Surface Science（2022）

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摘要

•The Bʹ-Al3Mg9Si8 has a slight brittleness and higher Young’s modulus.•The interface with T1-Al configuration has the best bonding strength.•Strong Al-Si covalent bond will be formed at the Bʹ (101¯0)/Al(5¯10) interface.•Cracks occur inside the Bʹ-phase adjacent to the Bʹ (101¯0)/Al(5¯10) interface.

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关键词

Bʹ precipitate,Interface,Mechanical properties,Fracture behavior,First-principles calculation

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