Example 4.14 Calculation of ASTM Grain Size Number
{"Image DocumentName": "Example 4.14 Calculation of ASTM Grain Size Number", "Image ImageDescription": "Suppose we count 16 grains per square inch in a photomicrograph taken at magnification \uf0b4 250. What is the ASTM grain size number? Example 4.14 SOLUTION. If we count 16 grains per square inch at magnification \uf0b4 250, then at magnification \uf0b4 100 we must have: N = (250/100)2 (16) = 100 grains/in.2 = 2n-1. Log 100 = (n \u2013 1) log 2. 2 = (n \u2013 1)(0.301) n = 7.64.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}