Example: barber
Standard Test Methods for Determining Average …
NAa = number of a grains per mm 2 at 1X in a two phase (constituent) microstructure. NAE = number of grains per inch 2 at 100X. NA, = NA on a longitudinally oriented surface for a non-equiaxed grain structure. N At = NA on a transversely oriented surface for a non-equiaxed grain structure. NAp = NA on a planar oriented surface for a non-equiaxed …
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