Publication

Measurement and anisotropy of grain boundary energy in Cu-1 wt.% PB

Andreas Mortensen, Vincent Laporte, Doris Empl
2010
Journal Articles

Abstract

A method is presented for the simultaneous measurement of relative grain boundary energy and all five macroscopic grain boundary degrees of freedom in leaded copper. When compared to the Wynblatt–Takashima model, results suggest a lowered boundary energy when there are equal broken-bond densities on either side of the boundary.

Official source

https://infoscience.epfl.ch/entities/publication/5be23174-171d-4c2e-9f17-d9bd094d72c4

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Andreas Mortensen, Vincent Laporte, Doris Empl
2010
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/5be23174-171d-4c2e-9f17-d9bd094d72c4

About this result

Related concepts (10)

Grain boundary

In materials science, a grain boundary is the interface between two grains, or crystallites, in a polycrystalline material. Grain boundaries are two-dimensional defects in the crystal structure, and tend to decrease the electrical and thermal conductivity of the material. Most grain boundaries are preferred sites for the onset of corrosion and for the precipitation of new phases from the solid. They are also important to many of the mechanisms of creep.

Crystallite

A crystallite is a small or even microscopic crystal which forms, for example, during the cooling of many materials. Crystallites are also referred to as grains. Bacillite is a type of crystallite. It is rodlike with parallel longulites. The orientation of crystallites can be random with no preferred direction, called random texture, or directed, possibly due to growth and processing conditions.

Grain boundary strengthening

In materials science, grain-boundary strengthening (or Hall–Petch strengthening) is a method of strengthening materials by changing their average crystallite (grain) size. It is based on the observation that grain boundaries are insurmountable borders for dislocations and that the number of dislocations within a grain has an effect on how stress builds up in the adjacent grain, which will eventually activate dislocation sources and thus enabling deformation in the neighbouring grain as well.

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