Astm E562-19e1 [2021] Online

The grid must be applied to a series of fields of view across the specimen.

: Samples are sectioned, mounted, ground, and polished to a mirror finish. Etching is applied to generate high visual contrast between the target phase (e.g., martensite, delta ferrite) and the matrix.

), manual point counting remains the "gold standard" for calibrating these systems and providing accurate results in complex microstructures where software may struggle to distinguish between similar-looking phases. Industrial Applications

General guideline:

A final test report compliant with ASTM E562-19e1 must include:

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To get the most accurate results out of ASTM E562-19e1, avoid these common procedural errors: Consequence Correction astm e562-19e1

: The year of adoption or most recent major technical revision (2019).

+---+---+---+---+ | . | . | . | . | <-- Overlay Grid Intersection Points (+) +---+---###-+---+ | . | . # . # . | <-- Microstructural Phase (###) +---+---###-+---+ | . | . | . | . | +---+---+---+---+ Step-by-Step Execution Protocol

This is the most critical statistical step. The goal is to achieve a (confidence interval) of 5% to 10% in the volume fraction estimate. The grid must be applied to a series

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The 95% confidence interval defines the precision of your estimate. It is calculated using the Student's t-distribution value ( degrees of freedom:

For example, if you count 1000 total points across many fields, and 125 of them land on the phase of interest, that phase has a volume fraction of 12.5%. The standard also details how to calculate statistical outputs like the mean, standard deviation, and the ±95% confidence interval to quantify the uncertainty of the measurement. ), manual point counting remains the "gold standard"