TY - GEN
T1 - An Atomistic Investigation of the Strengthening Mechanism of Aluminum Matrix Composites Reinforced by Intergranular and Intragranular Carbon Nanotubes
AU - Gao, Yuan
AU - Yan, Xin
AU - Li, Yong
N1 - Publisher Copyright:
© 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.
PY - 2024
Y1 - 2024
N2 - The mechanical characteristics of CNTs/Al composites are widely reported to be reinforced by carbon nanotubes (CNTs), but intergranular and intragranular CNTs play different roles in strengthening, whose detailed effects are hard to be directly observed and are not fully clear. In this paper, the strengthening mechanisms of aluminum matrix composites (AMC) reinforced by CNTs at different positions (intragranular or intergranular) are explored on an atomic scale. Molecular dynamics (MD) simulation models for AMC reinforced by intragranular and intergranular CNTs are constructed. The uniaxial tensile deformation tests are carried out at the temperature of 300K, using periodic boundary conditions (PBCs) in all three directions. The results show that adding CNTs in the aluminum can significantly strengthen the mechanical properties of the AMC. The improvement in tensile strength of the CNTs-reinforced materials is respectively 29.7% and 25.4% when compared with defective single-crystal aluminum (SA) and double-crystal aluminum (DA). Moreover, the strengthening mechanism of AMC reinforced by intragranular and intergranular CNTs is further explored through the MD simulations, including dislocation density and lattice structure transformation.
AB - The mechanical characteristics of CNTs/Al composites are widely reported to be reinforced by carbon nanotubes (CNTs), but intergranular and intragranular CNTs play different roles in strengthening, whose detailed effects are hard to be directly observed and are not fully clear. In this paper, the strengthening mechanisms of aluminum matrix composites (AMC) reinforced by CNTs at different positions (intragranular or intergranular) are explored on an atomic scale. Molecular dynamics (MD) simulation models for AMC reinforced by intragranular and intergranular CNTs are constructed. The uniaxial tensile deformation tests are carried out at the temperature of 300K, using periodic boundary conditions (PBCs) in all three directions. The results show that adding CNTs in the aluminum can significantly strengthen the mechanical properties of the AMC. The improvement in tensile strength of the CNTs-reinforced materials is respectively 29.7% and 25.4% when compared with defective single-crystal aluminum (SA) and double-crystal aluminum (DA). Moreover, the strengthening mechanism of AMC reinforced by intragranular and intergranular CNTs is further explored through the MD simulations, including dislocation density and lattice structure transformation.
KW - Aluminum matrix composite
KW - Carbon nanotube
KW - Intragranular and intergranular
KW - Molecular dynamics
KW - Strengthening mechanism
UR - https://www.scopus.com/pages/publications/85174844337
U2 - 10.1007/978-3-031-41341-4_48
DO - 10.1007/978-3-031-41341-4_48
M3 - 会议稿件
AN - SCOPUS:85174844337
SN - 9783031413407
T3 - Lecture Notes in Mechanical Engineering
SP - 467
EP - 473
BT - Proceedings of the 14th International Conference on the Technology of Plasticity - Current Trends in the Technology of Plasticity - ICTP 2023 - Volume 3
A2 - Mocellin, Katia
A2 - Bouchard, Pierre-Olivier
A2 - Bigot, Régis
A2 - Balan, Tudor
PB - Springer Science and Business Media Deutschland GmbH
T2 - 14th International Conference on Technology of Plasticity, ICTP 2023
Y2 - 24 September 2023 through 29 September 2023
ER -