These test methods cover procedures for estimating and rules for expressing the average grain size of all metals consisting entirely, or principally, of a single phase. The grain size of specimens with two phases, or a phase and a constituent, can be measured using a combination of two methods, a measurement of the volume fraction of the phase and an intercept or planimetric count.
KeywordsGrain Boundary - Grain Size - Heyn Intercept Method - Jeffries Planimetric Method - Microstructure - Photomicrography
ICS CODE77.040.01 (Testing of metals in general)
ASTM E112-13, Standard Test Methods for Determining Average Grain Size, ASTM International, West Conshohocken, PA, 2013, www.astm.org