Astm E562-19e1 Jun 2026

The standard operates on the mathematical foundation of . It utilizes the Delesse principal, which states that an unbiased two-dimensional areal fraction ( AAcap A sub cap A ) or a linear fraction ( LLcap L sub cap L

Executing a test according to ASTM E562-19e1 requires careful sample preparation and methodical data collection to prevent human bias and errors.

: Applied in materials like Ti-4822 to track lamellar vs. equiaxed grain content after cyclic induction treatments to verify high-temperature forgeability.

To ensure a test report fully complies with ASTM E562-19e1 certification guidelines, the final documentation must include the following fields: astm e562-19e1

RA%=95%CIP̄P×100cap R cap A % equals the fraction with numerator 95 % cap C cap I and denominator cap P bar sub cap P end-fraction cross 100

Strictly adhere to assigning exactly 0.5 points to intersections touching a phase boundary.

ASTM E562-19e1 is the standard for determining microstructural volume fraction via manual point counting, offering reliable results without complex software. While considered a foundational, high-accuracy tool, it is often critiqued for being subjective, labor-intensive, and prone to errors exceeding 10% compared to automated methods like ASTM E1245. The standard operates on the mathematical foundation of

The ASTM E562 method relies on the mathematical principles of stereology. Stereology relates three-dimensional structural parameters to two-dimensional measurements made on a cutting plane. The Point Fraction to Volume Fraction Relationship

To verify compliance with ASTM E562, calculate the Relative Accuracy ( RAcap R cap A ). The standard generally targets an RAcap R cap A of

To perform a manual point count according to ASTM E562, you need the following apparatus: equiaxed grain content after cyclic induction treatments to

is the standard test method for determining the volume fraction of a distinguishable constituent or phase in a microstructure using a systematic manual point count . Regulated by ASTM International , this specific revision ("19e1" designating the 2019 edition with its first editorial amendment) provides metallurgists, quality control engineers, and material scientists with a statistically robust, reproducible, and cost-effective manual framework to quantify phase distributions in metals, composites, and minerals without relying on advanced automated image software. Understanding the Standard Designation

s=∑[(PP)j−V̄V]2n−1s equals the square root of the fraction with numerator sum of open bracket open paren cap P sub cap P close paren sub j minus cap V bar sub cap V close bracket squared and denominator n minus 1 end-fraction end-root 3. 95% Confidence Interval (CI)

The ultimate goal of ASTM E562-19e1 is to calculate the average volume fraction and determine the to validate test accuracy. Phase Percentage Calculation For each field ( ), the percentage of the phase ( Picap P sub i ) is calculated as:

Once data from all fields are collected, calculate the average volume fraction and the statistical confidence intervals. 1. Mean Volume Fraction ( V̄Vcap V bar sub cap V

Published by ASTM International, this standard provides a rigorous, repeatable procedure for estimating the volume fraction of a constituent phase or feature within a two-dimensional polished section. This article dissects the standard in detail, covering its scope, history (including the meaning of the -19e1 suffix), theoretical basis, required apparatus, step-by-step procedure, calculations, and practical applications.