Dendrites in cst alloys form by mechanism of_________________?
Correct answer: B. Constitutional supercooling
- A. Constitutional superconductivity
- B. Constitutional supercooling
- C. Constitutional supergriting
- D. Constitutional supergraining
Explanation
Dendrites develop when solute rejected at the advancing solidification front lowers the liquidus temperature ahead of it, producing constitutional supercooling. This unstable undercooled liquid promotes branching of the solid phase.
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