From Equation 8

From Equation 8.19, if the logarithm of is plotted versus the logarithm of σ, then a straight line should result, the slope of which is the stress exponent n. Using Figure 8.31, determine the value of n for the S-590 alloy at 925°C, and for the initial (i.e., lower-temperature) straight line segments at each of 650°C, 730°C, and 815°C.

From Equation 8.19, if the logarithm of   is plotted versus the

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