GBMOBI
| (Material data)
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Update History:
V11 - GBMOBI has been introduced. | Last updated on : 25-07-2013
GBMOBI Material, M0, Q
| OPERAND | DESCRIPTION | DEFAULT |
|---|---|---|
| Material | Material Number | None |
| M0 | Grain boundary mobility | None |
| Q | Activation energy of material | None |
DEFINITION
GBMOBI specifies the grain boundary mobility of a material.
REMARKS
The movement of high angle grain boundaries (HAGB) has implications for recrystallization and grain growth while subgrain boundary (LAGB) movement strongly influences recovery and the nucleation of recrystallization. A boundary moves due to a pressure acting on it. It is generally assumed that the velocity is directly proportional to the pressure with the constant of proportionality being the mobility of the boundary. The mobility is strongly temperature dependent and often follows an Arrhenius type relationship: | 
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The apparent activation energy (Q) may be related to the thermally activated atomistic processes that occur during boundary movement.
Applicable object types: Elastoplastic
Applicable simulation type: Heat treatment