Line Tension of Grain Boundary Triple Junctions in the Copper Tricrystals

Plastic slip deformations of tricrystals with simplified geometries are numerically analyzed by a FEA-based crystal plasticity code. Accumulation of geometrically necessary (GN) dislocations, distributions of the total slip, plastic work density and GN dislocations on slip systems, as well as some indices for the intensity of slip multiplication are evaluated. Results show that coexistence of GN dislocations on different slip systems is prominent at triple junctions of grain boundaries.

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Structural stability and energetics of grain boundary triple junctions in face centered cubic materials

Scientific Reports ◽

10.1038/srep08692 ◽

2015 ◽

Vol 5 (1) ◽

Cited By ~ 14

Author(s):

I. Adlakha ◽

K. N. Solanki

Keyword(s):

Grain Boundary ◽

Structural Stability ◽

Face Centered Cubic ◽

Triple Junctions ◽

Cubic Materials ◽

Boundary Triple ◽

Face Centered

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Characterization of the early stages of electromigration at grain boundary triple junctions

Applied Physics Letters ◽

10.1063/1.104869 ◽

1991 ◽

Vol 58 (21) ◽

pp. 2354-2356 ◽

Cited By ~ 20

Author(s):

M. Genut ◽

Z. Li ◽

C. L. Bauer ◽

S. Mahajan ◽

P. F. Tang ◽

...

Keyword(s):

Grain Boundary ◽

Triple Junctions ◽

Early Stages ◽

Boundary Triple

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Novel Approaches to the Thermodynamis of Grain Boundaries and Grain Boundary Junctions

Materials Science Forum ◽

10.4028/www.scientific.net/msf.558-559.675 ◽

2007 ◽

Vol 558-559 ◽

pp. 675-682 ◽

Cited By ~ 1

Author(s):

Lasar S. Shvindlerman ◽

Günter Gottstein

Keyword(s):

Grain Size ◽

Grain Boundary ◽

Grain Boundaries ◽

Free Volume ◽

Triple Line ◽

Line Tension ◽

Special Technique ◽

Line Energy ◽

Excess Free Volume ◽

Boundary Triple

Three recent investigations in the field of thermodynamics of grain boundaries and grain boundary junctions are presented. 1. The grain boundary excess free volume (BFV) along with the surface tension belongs to the major thermodynamic properties of grain boundaries. A special technique, recently developed, makes it possible to measure the BFV for practically any grain boundary and provides a way of estimating the grain boundary excess free volume for grain boundaries of different classes with rather high accuracy. The experimental values of the BFV measured for different grain boundaries are compared and discussed. 2. A new approach will be presented that makes it possible to correctly measure the grain boundary triple line tension. For this the topography at an equilibrated triple junction was measured by atomic force microscopy. Preliminary results of grain boundary triple line energy measurements are presented. 3. The problem is discussed whether it is possible to achieve an equilibrium grain size during grain growth in single phase alloys. Various approaches to the problem are considered. It is shown that the most realistic possibility to stabilize the grain size in a polycrystal is by impurities with negative grain boundary adsorption.

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Effects of Triple Line Tension on the Surface Topography of Polycrystals

MRS Proceedings ◽

10.1557/proc-731-w6.7 ◽

2002 ◽

Vol 731 ◽

Author(s):

Jon L. Hilden ◽

Alexander H. King

Keyword(s):

Grain Boundary ◽

Grain Boundaries ◽

Triple Line ◽

Line Tension ◽

Triple Junctions ◽

Polycrystalline Thin Film ◽

Surface Evolver ◽

Grain Sizes ◽

Solid Specimen ◽

Numerical Software

AbstractA balance of surface energies exists where grain boundaries meet the surface of a flat solid specimen. The energy balance leads to grain boundary grooving on the surface, and the establishment of the equilibrium dihedral angle. Triple junctions are defined at the intersections of three grain boundaries. Surface grooves are typically observed to be the deepest at the triple junctions. In this work, a simple model is constructed of a polycrystalline thin film using Surface Evolver numerical software. The equilibrium sur face groove depths at triple junctions are investigated as a function of triple junction line tension. Results show that line tension can affect grain boundary groove depths for grain sizes less than ∼1μm.

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