Modification
- Created by: smallbat123
- Created on: 09-12-17 16:17
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- Modification
- Strengthening / hardening
- Hinder movement of dislocations
- Controlling grain size
- Reducing continuity of planes
- Boundaries have different grain orientations
- Barrier
- Alignment different
- Smaller grains
- Short distances for atom to move along plane
- Controlled by solidification rate
- Boundaries have different grain orientations
- Reducing continuity of planes
- Strain hardening
- Creating and tangling dislocations
- Cold working
- Plastic deformation
- More dislocations
- More interact
- Decrease mobility
- Strengthening
- Decrease mobility
- More interact
- Snaps due to fatigue cracking eventually
- More dislocations
- Plastic deformation
- Low temp.
- Atoms can't rearrange themselves
- Reduces ductitly
- Undone by heat treatment
- Recovery
- Increase temperature
- Increases atomic diffusion
- Relieves internal strain energy
- Freer to move, able to break bonds
- Restored to normal place in lattice
- Increases atomic diffusion
- Increase temperature
- Recrsytallization
- New strain free grains nucleate
- Grow inside old distorted grains
- Replace deformed = original state
- Grow inside old distorted grains
- More strained = lower temperature needed + more nuclei for new grains
- New strain free grains nucleate
- Grain growth
- Continued exposure to high temperature
- Grains grow in size
- Diffusion across boundries
- Larger grains lose fewer atoms and grow at expense of smaller grains
- Untitled
- Larger grains lose fewer atoms and grow at expense of smaller grains
- Diffusion across boundries
- Grains grow in size
- Continued exposure to high temperature
- Recovery
- Alloying
- Point defects and more grain to pin
- Other elements added
- Single phase (one material)
- Two or more phases
- Properties manipulated
- Varying composition
- Carbon = varied hardness
- Varying composition
- Controlling grain size
- Hinder movement of dislocations
- Strengthening / hardening
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