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Arresting grain boundaries with topology

Arresting grain boundaries with topology m Ate RiAl witness news & views It has been long known that (hill-like) and negative (bowl-like) the mechanical properties of curvatures balance one another. In polycrystalline metals and alloys 1834, mathematician Heinrich Scherk can be controlled by engineering showed that it is possible to construct the nature of their grain boundaries. such minimal surfaces that extend For example, the Hall–Petch forever, without boundaries, by a effect, discovered in the 1950s, is a periodic repetition of identical curved strengthening that arises as grain units. A few decades later, Hermann size decreases, due to the pinning of Schwarz found that one of the dislocations at the grain boundaries. building blocks of periodic minimal Philip Ball It typically leads to a maximal yield surfaces may be the saddle-like shape strength when grain sizes are in the of a soap film stretched across a range of tens of nanometres . But tetrahedral framework. This shape can what nanocrystalline metals gain in be assembled into three-dimensional of the formation of such ‘Schwarz strength, they may lose in ductility structures with cubic symmetry (a crystals’ — grain-boundary networks as dislocations become immobile. P-surface), diamond-lattice symmetry corresponding to both the P- and Grain-boundary effects can http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nature Materials Springer Journals

Arresting grain boundaries with topology

Ball, Philip
Nature Materials , Volume 20 (11) – Nov 1, 2021
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Arresting grain boundaries with topology

Abstract

m Ate RiAl witness news & views It has been long known that (hill-like) and negative (bowl-like) the mechanical properties of curvatures balance one another. In polycrystalline metals and alloys 1834, mathematician Heinrich Scherk can be controlled by engineering showed that it is possible to construct the nature of their grain boundaries. such minimal surfaces that extend For example, the Hall–Petch forever, without boundaries, by a effect, discovered in the 1950s, is a periodic...
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References (8)

Publisher
Springer Journals
Copyright
Copyright © Springer Nature Limited 2021
ISSN
1476-1122
eISSN
1476-4660
DOI
10.1038/s41563-021-01145-6
Publisher site
See Article on Publisher Site

Abstract

m Ate RiAl witness news & views It has been long known that (hill-like) and negative (bowl-like) the mechanical properties of curvatures balance one another. In polycrystalline metals and alloys 1834, mathematician Heinrich Scherk can be controlled by engineering showed that it is possible to construct the nature of their grain boundaries. such minimal surfaces that extend For example, the Hall–Petch forever, without boundaries, by a effect, discovered in the 1950s, is a periodic repetition of identical curved strengthening that arises as grain units. A few decades later, Hermann size decreases, due to the pinning of Schwarz found that one of the dislocations at the grain boundaries. building blocks of periodic minimal Philip Ball It typically leads to a maximal yield surfaces may be the saddle-like shape strength when grain sizes are in the of a soap film stretched across a range of tens of nanometres . But tetrahedral framework. This shape can what nanocrystalline metals gain in be assembled into three-dimensional of the formation of such ‘Schwarz strength, they may lose in ductility structures with cubic symmetry (a crystals’ — grain-boundary networks as dislocations become immobile. P-surface), diamond-lattice symmetry corresponding to both the P- and Grain-boundary effects can

Journal

Nature Materials – Springer Journals

Published: Nov 1, 2021

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