ASTM E562-11 pdf free download.Standard Test Method for Determining Volume Fraction by Systematic Manual Point Count.
1 .1 This test method describes a systematic manual point counting procedure for statistically estimating the volume fraction of an identifiable constituent or phase from sections through the microstructure by iieans of a point grid.
1.2 The use of automatic image analysis to determine the volume fraction of constituents is described in Practice E 1245.
1 .3 The values stated in SI units are to he regarded as standard. No other units of measurement are included in this standard.
1 .4 This standard does nor purport to address all of the safrtv concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish approJ)1-iate safety and health practices and determine (lie applicabilitv of regulatory limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:2
E3 Guide for Preparation of Metallographic Specimens
E7 Terminology Relating to Metallography
E407 Practice for Microetching Metals and Alloys
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E1245 Practice for Determining the Inclusion or Second-Phase Constituent Content of Metals by Automatic Image
Analysis
3. Terminology
3.1 Definitions—For definitions of terms used in this practice, see Terminology E7.
3.2 Definitions of Terms Specific to This Standard:
3.2. 1 point count—the total number of points in a test grid that fall within the microstructural feature of interest, or on the feature boundary; for the latter, each test point on the boundary is one half a point.
3.2.2 point fraction—the ratio, usually expressed as a percentage. of the point count of the phase or constituent of interest on the two-dimensional image of an opaque specimen to the number of grid points, which is averaged over n fields to produce an unbiased estimate of the volume fraction of the phase or constituent.
3.2.3 stereology—the methods developed to obtain information about the three-dimensional characteristics of microstruclures based upon measurements made on two-dimensional sections through a solid material or their projection on a surface.
3.2.4 test grid—a transparent sheet or eyepiece reticle with a regular pattern of lines or crosses that is superimposed over the microstructural image for counting microstructural features of interest.
3.2.5 volume fraction—the total volume of a phase or constituent per unit volume of specimen. generally expressed as a percentage.ASTM E562 pdf download.