https://doi.org/10.1140/epjb/s10051-022-00285-1
Regular Article - Computational Methods
Influence of orientation on crack propagation of aluminum by molecular dynamics
1
Hunan University of Arts and Science, 415000, Changde, China
2
College of Materials Science and Engineering, Hunan University, 410082, Changsha, China
Received:
20
October
2021
Accepted:
18
January
2022
Published online:
8
February
2022
The crack growth behavior of single crystal aluminum is investigated under tensile test at room temperature by molecular dynamics simulations. Three crack models are selected, which are [001](010) crack, (
10)[110] crack and [11
](111) crack. The results present that the mechanical properties and deformation mechanisms are significantly influenced by the orientation of initial crack. The [10] (110) crack has the maximum yield strength, the [11] (111) crack has the maximum elastic modulus. The [001](010) crack propagates in the form of micro-cracks and shows ductility fracture, and the main deformation mechanisms are blunting and slip bands at crack tip. The (10)[110] crack evolves into a void with the loading increasing, presents ductile extension, and the slip bands divide the crystal structure into mesh region. For (111) [11] crack, it has very good toughness and ductility and can effectively reduce structural damage caused by crack propagation.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2022
