Creep behavior of polycrystalline Al (metal)-Cu50Zr50 (metallic glass) cold welds

Singh, Chandra Prakash; Katakam, Krishna Chaitanya; Katakareddi, Ganesh; Yedla, Natraj

doi:10.1016/j.matpr.2020.09.334

Cited by 2 publications

(3 citation statements)

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“…2, which plots the evolution of the velocity of the left MGNW with time. The welding and stretching velocity of the MGNW are higher than that used in experiments [1] but universal for MD simulations according to previous works [4,34,37].…”

Section: Models and Methodsmentioning

confidence: 71%

“…The green and white atoms indicate Cu and Zr atoms, respectively. A boundary layer with the thickness b = 1 nm is immobilized at the end of each MGNW and the force among atoms on each boundary layer is set to be zero, similar to the reference [4]. To avoid the initial atomic interactions between the two MGNWs during minimization and subsequent relaxation, a prior separation distance of 1 nm is employed, as shown in Fig.…”

Section: Models and Methodsmentioning

confidence: 99%

“…In recent ten years, cold welding technique has been extensively reported for joining and assembling of materials at the nanoscale without melting and just by a low-applied external load, which has promising applications in the fields of nano-and micro-electromechanical systems [1][2][3][4][5][6]. In 2010, Lu et al [1] successfully cold-welded crystalline gold nanowires with diameters lower than 10 nm.…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

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Cold welding behavior of metallic glass nanowires: Insights from large-scale numerical simulations

Zhang

Zhou

et al. 2021

J Mater Sci

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Cold welding technique at room temperature is the preferred option in nanoassembly and nano-jointing. In this study, the cold welding behavior and mechanical strength of Cu 50 Zr 50 metallic glass nanowires (MGNWs) in head-tohead contact are investigated by molecular dynamics simulation based on the embedded atom method potential. Effects of welding velocity, operating temperature, and size of nanowires are discussed with the consideration of stress, shear strain, atomic deformation processes, and weld quality. Our simulation results demonstrate that a desirable weld quality can be obtained at room temperature. With an increase in welding velocity, the shear deformation zones of the welded MGNWs increase, leading to a decrease in mechanical strength. However, the effect of temperature on the weld quality is not pronounced. Besides, the elongation ability of the welded MGNWs increases with increasing diameters of nanowires. Smaller diameter results in better weld quality due to the size effect of metallic glass. For a pair of MGNWs with different diameters, the necking and fracture of the welded MGNWs occur in the regions of the nanowire with a relatively smaller diameter. This study carries major implications for the fabrication and structural assembly of metallic glass-based nanomaterials.

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