(a) Employing the intercept technique, determine the mean intercept length for the steel s...

(a) Employing the intercept technique, determine the mean intercept length for the steel specimen whose microstructure is shown in Figure 9.25a; use at least seven straight-line segments.

(b) Estimate the ASTM grain-size number for this material.

Figure 9.25 Photomicrographs of (a) α-ferrite (90×). (Copyright 1971 by United States Steel Corporation.)