# ps4p2 - 5 hrs = 11.4 yrs 3(c 3 points A Larson-Miller plot...

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2 Problem 2: Grading: Total of 9 points. (a) +3 points for correct plot. The MathCad session below constructs a Larson-Miller plot for the given data: (b): +3 points For s = 100 MPa, the Larson-Miller parameter L = 25 x 10 3 K-log(hr). Since L = T 20 + logtr ( ) and since T = 1000 K, one can solve for the time to rupture (tr). The MathCad program below is a continuation of the one above. The answer is 10

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Unformatted text preview: 5 hrs = 11.4 yrs. 3 (c) +3 points A Larson-Miller plot is convenient since it collapses stress-temperature-rupture lifetime data onto a 2-dimensional plot. This enables predictions of rupture lifetimes that are too large to investigate by experiment, by using data from more convenient tests with shorter rupture lifetimes....
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ps4p2 - 5 hrs = 11.4 yrs 3(c 3 points A Larson-Miller plot...

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