Grain boundary relaxation in doped nano-grained aluminum

Ye, Wenye; Hohl, Jake; Misra, M.; Liao, Yiliang; Mushongera, Leslie T.

doi:10.1016/j.mtcomm.2021.102808

Cited by 8 publications

(3 citation statements)

References 37 publications

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“…At the same time, in wires from the AC50 cable of the same service life, due to the stabilizing influence of the steel core, this effect was observed to a lesser extent than in wires from the A50-type cable without a steel core [26]. In [78], the formation of large grains with the disordering of HAGBs in nanocrystalline aluminum under tensile loads is associated with strain relaxation preventing the development of cracks. Thus, in wires after long-term operation and fatigue tests, the reverse effect of ordering the HAGBs is observed, which is associated with the aging of the wires.…”

Section: Troublemaking Areas Of the Ac50 Cable On Spanmentioning

confidence: 91%

Characteristics of Wires of the Long-Operated Aluminum-Steel Cable at Different Places on an Overhead Power Line Span

et al. 2023

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During operation, cables of overhead power lines (OPLs) are exposed to the impact that differs in separate parts of the OPL span due to the different responses of cables near the clamps and far from them. This paper presents the results of a study of aluminum and steel wires cut from such separate parts of ACSR cables before and after exploitation. Structural, microstructural, and elastic–microplastic properties of wires and their changes during operation were studied through optical microscopy, energy-dispersive X-ray microanalysis, electron backscattering diffraction, X-ray diffraction, densitometry, and acoustic measurements. The characteristics of the properties of the wires along the span were found to change in a coordinated manner. Numerical estimates of the influence of the steel core on aging the ACSR cable were obtained. Changes in the properties of the wires, as well as oxidization and corrosion of their near-surface layers, were studied in detail. Quantitative values of the characteristics of properties, the most distant from those observed in the new wires, were revealed for samples of aluminum and steel wires cut from the cable at 1/4 span and near clamps. It is assumed that these cable parts should be the most crucial for cable durability.

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Section: Troublemaking Areas Of the Ac50 Cable On Spanmentioning

confidence: 91%

Characteristics of Wires of the Long-Operated Aluminum-Steel Cable at Different Places on an Overhead Power Line Span

et al. 2023

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“…Strategies for limiting grain growth include solute segregation, chemical ordering, porosity drag, second phase drag, solute drag, and grain size stabilisation (Koch 2007;Qin, Shivakumar, and Luo 2023). Even though there are numerous studies on nanostructured materials, the precise grain boundary mechanisms and maintaining stability remain inconclusive (Ye et al 2021). Efforts to stabilize the nanosized grains of these materials are expected to facilitate the production of bulk nanostructured products for advanced applications (Kotan 2018).…”

Section: Processing Of Nanostructured Materialsmentioning

confidence: 99%

Nanostructured Materials, Structures and Mechanical Properties, Processing and Applications

Majerič

2024

Metall Mater Data

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Nanomaterials are becoming an integral part of high-performance products and services. As technology advances, the possibilities for engineering components with nanomaterials are more numerous, taking advantage of the benefits that these materials have the potential to provide. Nanostructured materials have bulk dimensions with a structure that includes nanoscale features, and have been around for quite some time, hidden in everyday items. More recently, they have been made possible to be analysed and manipulated with increasingly sophisticated instruments and processes. This ability has made them more accessible, however, challenges still remain in the more widespread adoption of these materials for exploiting their advantages. The present paper outlines the position and emergence of nanostructured materials in the broader context of nanomaterials, examining their mechanical properties, production methods and applications.

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“…[3,4] A small grain size increases the polycrystalline material's strength because the large fraction of grain boundaries act as effective barriers to dislocation motion in such a fine microstructure. [5][6][7] However, the grains can evolve for various reasons leading to an undesirable grain size. For example, grains can thermally fluctuate from their original sizes leading to an increase in the average grain size.…”

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confidence: 99%

Interfacial Interactions in Particle‐Induced Abnormal Grain Growth

2023

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The presence of secondary particles to polycrystalline alloys results in kinetic stabilization of the grain boundaries, which maintains desirable fine microstructures. In some instances, secondary particles trigger abnormal grain growth. The mechanisms influencing abnormal grain growth are still a subject of conjecture. As dispersed fine particles can contribute to abnormal grain growth, it is necessary to clarify the governing mechanism by which this occurs. The current work employs a multiphase field modeling approach to shed light onto abnormal grain growth. Particular attention is placed on understanding the role of grain boundary–particle interactions on abnormal grain growth. The results show that, in the presence of particles, normal grain growth occurs until a pinned state is achieved. In the pinned state, some grains overcome the pinning pressure exerted by some particles by piercing through the particles, which results in abnormal grain growth. The piercing events appear to be entirely random and not related to the size of the interacting particles. None‐the‐less, a bimodal particle size distribution is observed to lead to abnormal grain growth. A pinning parameter is introduced as a metric to identify the transition from normal to abnormal grain growth.

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Grain boundary relaxation in doped nano-grained aluminum

Cited by 8 publications

References 37 publications

Characteristics of Wires of the Long-Operated Aluminum-Steel Cable at Different Places on an Overhead Power Line Span

Characteristics of Wires of the Long-Operated Aluminum-Steel Cable at Different Places on an Overhead Power Line Span

Nanostructured Materials, Structures and Mechanical Properties, Processing and Applications

Interfacial Interactions in Particle‐Induced Abnormal Grain Growth

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