Cyclic grain boundary migration during high temperature fatigue—II. Measurements of grain boundary sliding

1983 ◽  
Vol 31 (6) ◽  
pp. 939-946 ◽  
Author(s):  
T.G. Langdon ◽  
D. Simpson ◽  
R.C. Gifkins
Keyword(s):  
High Temperature ◽  
Grain Boundary ◽  
Boundary Migration ◽  
Grain Boundary Sliding ◽  
Grain Boundary Migration ◽  
High Temperature Fatigue ◽  
Boundary Sliding

Shear coupled grain boundary migration as a deformation mechanism in minerals.

2020 ◽  
Author(s):  
Gill Pennock ◽  
Martyn Drury
Keyword(s):  
Grain Boundary ◽  
Deformation Mechanism ◽  
Boundary Migration ◽  
Critical Shear Stress ◽  
Grain Boundary Sliding ◽  
Grain Boundary Migration ◽  
Extensive Literature ◽  
Literature Study ◽  
Wide Range ◽  
Boundary Sliding

<p>A grain boundary can move under stress by a mechanism called shear coupled grain boundary migration (SC GBM) and contribute to strain. SC GBM is considered to be a general property of all grain boundaries over a wide range of misorientation angles, although higher deformation temperatures favour grain boundary sliding. Apart from a structured boundary interface, SC also requires a critical shear stress. We examine evidence for SC GBM in ice. An extensive literature study showed that SC GBM of high angle boundaries does occur in ice bicrystals that were probably deformed under conditions close to those found in nature. We conclude that SC GBM is likely to be an important deformation mechanism for geological materials, where extensive GBM occurs and also in nano sized materials, such as fault gauges.</p>

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