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After studying this section,
the user should be able to:
- Predict onset of constitutional undercooling.
- Explain how a plane front reaches down to cells and dendrites.
- Predict the scale of the primary arm spacing, using the Mullins & Sekerka equation.
- Appreciate that dendrites tend to grow along certain crystallographic directions.
- Relate occurence of easy growth directions to development of a columnal grainstructure.
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