The method relies on the stereological principle that overlaying a grid of points onto a 2D section of a material provides an unbiased estimate of the 3D volume fraction.
You can also download the ASTM E562-19 PDF from the ANSI Webstore .
When engineers, metallurgists, and quality control managers search for or "astm e562-19 pdf" , they are typically looking to acquire the formal, legally binding document required for laboratory accreditation (e.g., ISO/IEC 17025). What is Included in the Official PDF? astm e56219 pdf
= Total points in the grid multiplied by the number of fields ASTM E562-19 vs. Previous Versions
ASTM E562-19 outlines a systematic, manual point-counting procedure to accurately estimate the 3D volume fraction of microstructural phases in materials using a 2D grid overlay. The standard enables precise quantification of constituents like ferrite in steels by analyzing microscopic fields and calculating a 95% confidence interval for the result. Authorized PDF copies can be purchased directly from the ASTM International website ASTM International The method relies on the stereological principle that
%RA=95%CLP̄P×100% cap R cap A equals the fraction with numerator 95 % cap C cap L and denominator cap P bar sub cap P end-fraction cross 100
) of a phase on a random two-dimensional planar section provides an of its true three-dimensional volume fraction ( VVcap V sub cap V What is Included in the Official PDF
The test relies on superimposing a regularly arrayed grid of points over a magnified image (micrograph) of a polished and etched specimen.
Fields of view must be selected without bias . Using a random or systematic stage movement technique is recommended. Counting: Count the number of points ( Picap P sub i
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This process is repeated over multiple, non-overlapping fields of view to ensure statistical representation. 5. Calculation The Volume Fraction ( Vvcap V sub v ) is calculated using the following formula: