Cold welding of ultrathin metallic glass nanowires with side-to-side contact using molecular dynamics simulations

Zhang, Yuhang; Xu, Jianfei; Hu, Yiqun; Ding, Suhang; Xia, Re

doi:10.1016/j.mtcomm.2022.103937

Cited by 6 publications

(11 citation statements)

References 59 publications

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“…A relatively more obvious oscillation of p xx is observed, primarily because we only control the region with 1 nm thickness in the boundary layer, and the other end of the nanowire tends to oscillate at a certain frequency, which is reported in our previous study. [ 22 ] During the holding stage, p xx fluctuates around −0.4 GPa. The compressive stress caused by the bending and squeezing of the nanowires is gradually released in this stage.…”

Section: Resultsmentioning

confidence: 99%

“…Besides, the welding stress increases at a relatively larger overlap length, causing more damage to nanowires during the welding process (as shown in Figure 4d), which is generally undesirable in the engineering application. Zhang et al [ 22 ] performed the same study on Cu–Zr MGNWs. Our findings are identical to those of Zhang et al, indicating that the overlap length has a similar effect on crystalline and amorphous metal cold‐welded samples.…”

Section: Resultsmentioning

confidence: 99%

“…However, there is no relative slip occurring at the welded interface of the two nanowires, which is different from our previous study about metallic glass nanowires (MGNWs), where the sliding failure occurred along the welded interface during the tensile process. [22] Figure 2b illustrates the normal stresses p xx , p yy , and p zz in three directions during the welding-holding-unloading stages. Here, the stress is defined as the average virial stress of all atoms.…”

Section: Basic Cold Welding Behaviormentioning

confidence: 99%

“…This plastic enhancement mechanism of cold welded samples, which is related to the rotation of the welded joint, has been reported in previous research. [17,22] To delve into the stress state of the sample in the holding stage, stress distribution along the x-axis of the nanowire is depicted in Figure 3b. The nanowires are uniformly divided into small blocks of %1 nm along the x-axis and the average stress for each block is calculated.…”

Section: Basic Cold Welding Behaviormentioning

confidence: 99%

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Mechanical Properties of Cold‐Welded CoCrFeCuNi Nanowires with Side‐by‐Side Contact: A Molecular Dynamics Study

Liu

Zhang

et al. 2023

Physica Status Solidi (a)

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Cold welding at the nanoscale is a promising technique for bottom‐up fabrication and assembly of nanostructured materials. In this paper, we investigate the cold welding process of the CoCrFeCuNi high‐entropy alloy (HEA) nanowires in the form of side‐by‐side contact using molecular dynamics simulation. The effects of overlap length, crystal orientation, and temperature are taken into consideration. Our results demonstrate that strength is positively correlated with the overlap length. Fracture strain first increases up to a maximum and then decreases with the increase in overlap length. When the temperature increases from 300 K to 900 K, the ultimate stress of the welded nanowires decreases from 1.18 GPa to 0.87 GPa, and the welding stress decreases from ‐0.54 GPa to ‐0.26 GPa. The crystal orientation significantly influences the deformation mechanism. For samples welded by nanowires with the same crystal orientation, the primary deformation mechanisms are twinning and dislocation slip. However, for samples welded by nanowires with different crystal orientations, the deformation is primarily mediated by the grain boundary slip. Our research can enhance the understanding of the cold welding behavior for low‐dimensional materials and is hopeful to provide some valuable guidance for the bottom‐up fabrication and assembly of HEAs nanocomponents.This article is protected by copyright. All rights reserved.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Basic Cold Welding Behaviormentioning

confidence: 99%

Section: Basic Cold Welding Behaviormentioning

confidence: 99%

See 2 more Smart Citations

Mechanical Properties of Cold‐Welded CoCrFeCuNi Nanowires with Side‐by‐Side Contact: A Molecular Dynamics Study

Liu

Zhang

et al. 2023

Physica Status Solidi (a)

Self Cite

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“…This is the conventional cold welding mechanism and is reported extensively. 12,14,24,60,61 (2) The embedding of ligaments of one NPAA in voids of the other is observed, as the white arrows in the right column of Fig. 3 show.…”

Section: Basic Cold Welding Processesmentioning

confidence: 99%