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We are solidifying aluminum and iron melts in plaster molds. The melts are poured with no...

We are solidifying aluminum and iron melts in plaster molds. The melts are poured with no superheat and resistance to heat flow at the mold/metal interface and within the solidified metal are negligible. Plot thickness of the solidified layer, s, vs. (t)1/2. Repeat calculations also for a sand mold. What can you conclude?

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in this way we can do for sand mould

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