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Molecular dynamics simulation of the grain boundary sliding behaviour for Al Σ5 (2 1 0)

Journal Article


Abstract


  • In this study the grain boundary sliding (GBS) behaviour driven by a constant shear rate or shear force was investigated for the Al Σ5 (2 1 0) grain boundary at 500–750 K. It is found that regardless of the type of driving force, the bi-crystal system tended to resist the force applied by GB rotation which resulted from the surface strain, GB migration, or GB coupled motion. The GB generally rotated to the (1 0 0) plane of the left grain by 26.57° and in particular cases to the (0 1 0) plane of the right grain by 63.43°. Under a constant shear force the GBS only experienced a certain GB rotation and slid away when a threshold stress was reached. This threshold stress decreased with the increase of temperature, but under a constant shear rate, the GBS was strongly related to the temperatures. At 500 K, the GBS experienced a relatively complicated process involving GB migration, coupled motion, grain rotation, released defects and the beginning of cracks, while at 750 K, GB rotation dominated GBS behaviour.

Publication Date


  • 2014

Citation


  • Cheng, K., Tieu, K., Lu, C., Zheng, X. & Zhu, H. (2014). Molecular dynamics simulation of the grain boundary sliding behaviour for Al Σ5 (2 1 0). Computational Materials Science, 81 52-57.

Scopus Eid


  • 2-s2.0-84888358159

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/2077

Has Global Citation Frequency


Number Of Pages


  • 5

Start Page


  • 52

End Page


  • 57

Volume


  • 81

Place Of Publication


  • Netherlands

Abstract


  • In this study the grain boundary sliding (GBS) behaviour driven by a constant shear rate or shear force was investigated for the Al Σ5 (2 1 0) grain boundary at 500–750 K. It is found that regardless of the type of driving force, the bi-crystal system tended to resist the force applied by GB rotation which resulted from the surface strain, GB migration, or GB coupled motion. The GB generally rotated to the (1 0 0) plane of the left grain by 26.57° and in particular cases to the (0 1 0) plane of the right grain by 63.43°. Under a constant shear force the GBS only experienced a certain GB rotation and slid away when a threshold stress was reached. This threshold stress decreased with the increase of temperature, but under a constant shear rate, the GBS was strongly related to the temperatures. At 500 K, the GBS experienced a relatively complicated process involving GB migration, coupled motion, grain rotation, released defects and the beginning of cracks, while at 750 K, GB rotation dominated GBS behaviour.

Publication Date


  • 2014

Citation


  • Cheng, K., Tieu, K., Lu, C., Zheng, X. & Zhu, H. (2014). Molecular dynamics simulation of the grain boundary sliding behaviour for Al Σ5 (2 1 0). Computational Materials Science, 81 52-57.

Scopus Eid


  • 2-s2.0-84888358159

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/2077

Has Global Citation Frequency


Number Of Pages


  • 5

Start Page


  • 52

End Page


  • 57

Volume


  • 81

Place Of Publication


  • Netherlands