Engineering Board Exam Reviewer · Engineering Materials · hard
If a carburized case 0.5 mm deep is obtained in 10 hours at a certain temperature, how long would it take to obtain a 1.0 mm case at the same temperature? (x sqrt(Dt))
- 20 hours
- 40 hours
- 14.1 hours
- 100 hours
Answer
B. 40 hours
Solution
x sqrt(t) t2 = t1(x2/x1)2 = 10(2)2 = 40 hours.
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