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Grain diameter

  • Thread starter Sniperfx20
  • Start date
The average grain diameter for a metal alloy was measured as a function of time at 650°C. The results are tabulated below:

Time Grain diameter
(min) (mm)
30 3.9 x 10-2
90 6.6 x 10-2

Predict what the grain diameter would be (in mm) after 199 min at the same temperature if n=2.

any ideA?
 

Answers and Replies

Mapes
Science Advisor
Homework Helper
Gold Member
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Hi Sniperfx20, welcome to PF. Can you tell us what n is? It would also be helpful if you told us any equations that you've been given along with showing your attempt at the problem.
 
Astronuc
Staff Emeritus
Science Advisor
18,542
1,684
The average grain diameter for a metal alloy was measured as a function of time at 650°C. The results are tabulated below:

Time Grain diameter
(min) (mm)
30 3.9 x 10-2
90 6.6 x 10-2

Predict what the grain diameter would be (in mm) after 199 min at the same temperature if n=2.

any ideA?
Looks like a grain growth problem. One has two sizes and two times, and one is trying to use a function. Is 'n' an exponent to a growth or diffusion equation? If so, then n=2 is a quadratic function.
 

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