7: Mechanisms of Plasticity
- Page ID
- 8212
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Learning Objectives
On completion of this TLP you should:
- Understand how new dislocations are generated from a Frank-Read source
- Calculate the critical shear stress required to operate a Frank-Read source
- Describe the interactions between two dislocations
- Explain the origin of solute-solution strengthening in terms of the interactions between the strain fields of dislocations and solute atoms
- Describe the formation of Lomer lock
- Understand how jogs and kinks are formed, and their significance in work hardening
- Understand the significance of Frank-Read source, Lomer lock, jogs and kinks in forest hardening
- Describe stage 1 and 2 in the deformation of a single crystal
- Explain the process of grain boundary hardening in a poly-crystal
The following TLPs could be helpful Introduction to Dislocations (Basic information about dislocations) and Slip in Single Crystals (Information about slip in an fcc metal, including stage I and II of its deformation)