Molecular dynamics simulation of the effect of surface roughness and pore on linear friction welding between Ni and Al

Jiao, Zhen; Song, Changbao; Lin, Tiesong; He, Peng

doi:10.1016/j.commatsci.2011.06.033

Cited by 30 publications

(11 citation statements)

References 18 publications

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“…( 1)), which will facilitate further scientific investigation into atomic level surface roughness. It should be pointed out that atomic level rough surface is different from those at the nano-or micro-scale [29][30][31][32][33][34]. A rough surface at the microscopic scale may become smooth at the atomic level due to the existence of facets at the atomic level.…”

Section: Discussionmentioning

confidence: 99%

Atomic ordering in the liquid adjacent to an atomically rough solid surface

Jiang

Men

Fan

2018

Computational Materials Science

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In this work, atomic ordering in the liquid adjacent to both crystalline and amorphous substrates with atomic level surface roughness was investigated systematically using molecular dynamics (MD) simulations. We found for the first time that increasing surface roughness of a crystalline substrate reduces both atomic layering and in-plane atomic ordering in the metallic liquid adjacent to the liquid/substrate interface. In addition, our MD simulation results revealed that the rough surface of an amorphous substrate eliminates completely in-plane ordering in the liquid regardless of surface roughness and reduces/eliminates atomic layering in the liquid depending on the level of surface roughness. This reduced atomic ordering in the liquid adjacent to an atomically rough surface can be attributed to the increase in mobility of atoms in the liquid compared with the case with a smooth crystalline surface. From the point of view of heterogeneous nucleation, in addition to the effect of lattice misfit investigated in our previous studies, this work provides further confirmation of the importance of structural templating as a mechanism for both prenucleation and heterogeneous nucleation. Furthermore, this work offers a new approach to impede heterogeneous nucleation by roughening the substrate surface at the atomic level.

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Section: Discussionmentioning

confidence: 99%

Atomic ordering in the liquid adjacent to an atomically rough solid surface

Jiang

Men

Fan

2018

Computational Materials Science

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“…In this study, the latest interatomic potential of Al-Ni developed by Mishin in 2009 was used for the simulation. This interatomic potential also has been used in several investigations reported as successful that employed MD simulation, such as for diffusion-bonding of Ni-Al [20] and linear friction welding of Ni-Al [29].…”

Section: Simulation Modelling and Methodsmentioning

confidence: 99%

Atomistic Investigation on the Role of Temperature and Pressure in Diffusion Welding of Al-Ni

Zaenudin

Abdulrazaq

Al-Zubaidi

et al. 2020

J. Eng. Technol. Sci.

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This paper presents an investigation of diffusion welding of aluminum and nickel at the atomic scale by utilizing molecular dynamics simulation. By employing several temperature and pressure values, the significant influence of the two could be obtained and thus the optimum parameter values could be obtained. The results showed that the bonding mechanism is mostly promoted by Al, in which the deformation and defects are involved. The results on both the mechanical properties and the evolution of the diffusion configuration showed that temperature has more impact compared to pressure. It was indicated that by raising the temperature to 700 K with the lowest pressure (50 MPa), both the mechanical properties and the evolution of the diffusion configuration showed a relatively significant difference. On the one hand, the deformation that occurs during welding, which is mostly caused by raising the temperature, obviously promotes joining and therefore more joining depth can be achieved, although it results in a curved diffusion zone at the interface. On the other hand, it also leads to a lower ultimate tensile strength. During the tensile test, raising the temperature also led to focusing the deformation in the diffusion zone, while a lower temperature resulted in a wider area of deformation.

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“…Chen et al [6] studied microstructure evolution, heat dissipation and generation of mixing layers in the region near the contact interface during nanoscale friction using MD simulations. Jiao et al [20] presented an atomic model to study linear friction welding between Ni and Al. They reported that the pore closure occurred due to atomic diffusion and interface deformation in Al and Ni parts, respectively.…”

Section: Introductionmentioning

confidence: 99%

Molecular dynamics simulation of interface atomic diffusion in ultrasonic metal welding

Mostafavi

Bamer

Markert

2021

Int J Adv Manuf Technol

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The formation of a reliable joint between a large number of aluminum strands for battery applications is crucial in automotive industry, especially in the technology of autonomous vehicles. Therefore, in this study, mechanical deformations and diffusion patterns of the mating interface in ultrasonic welding of aluminum were investigated using molecular dynamics simulations. Furthermore, microscopic observations of the joints between aluminum strands from ultrasonic welding illustrating the influence of two process parameters were done. To study the nanomechanics of the joint formation, two aluminum crystallites of different orientations were built. The impact of the sliding velocity and the compression rate of the upper crystal block on the diffusion pattern at the interface of the two crystallites were quantified via the diffusion coefficient. Tensile deformations of several joint configurations were performed to investigate the load-bearing capacity of the solid state bond, taking into account the compression rate, the sliding velocity and the crystallite orientation. The atomic scale simulations revealed that the orientations of the crystallites govern the interface diffusion and the tensile strength of the joint significantly. Furthermore, interface atom diffusion increased with increasing the sliding velocity. Additionally, it was observed that a higher sliding velocity enhances the friction heat generation between the crystallites and significantly increases the interface temperature.

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Molecular dynamics simulation of the effect of surface roughness and pore on linear friction welding between Ni and Al

Cited by 30 publications

References 18 publications

Atomic ordering in the liquid adjacent to an atomically rough solid surface

Atomic ordering in the liquid adjacent to an atomically rough solid surface

Atomistic Investigation on the Role of Temperature and Pressure in Diffusion Welding of Al-Ni

Molecular dynamics simulation of interface atomic diffusion in ultrasonic metal welding

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