Astm E562-19e1 Fix (2026)

If the grid intersection falls directly on the boundary or interface between the phase of interest and the matrix.

| Characteristic | ASTM E562-19e1 (Manual) | ASTM E1245 (Automated) | | :--- | :--- | :--- | | | Systematic manual point counting by a human operator. | Computer-controlled image segmentation and pixel counting. | | When to Use | * When an automated system is unavailable. * When the microstructure is complex and a computer cannot reliably distinguish phases. * For low-volume fractions or validation of automated results. | * For high-volume, repetitive analysis. * When the phases have clear, high-contrast boundaries. * When speed and throughput are the primary concerns. | | Relative Accuracy | Highly accurate and considered the reference method, but can be slow for large datasets. | Very fast, but accuracy is highly dependent on proper sample preparation and image thresholding. | | Context | Traditionally used for pore size distribution (PSD) analysis of nuclear fuels like U-Mo. | Automated methods using software like ImageJ and MATLAB are being validated as suitable alternatives to manual counting to improve efficiency. | astm e562-19e1

The metallic specimen must be cross-sectioned, mounted in epoxy resin, sequentially ground using fine silicon carbide papers, and polished to a flawless mirror finish (typically using 1-micron diamond suspensions). If the grid intersection falls directly on the

This standard relies on stereology—a field of science that interprets three-dimensional structures based on two-dimensional cross-sections. According to stereological principles, the point fraction ( PPcap P sub cap P | | When to Use | * When an automated system is unavailable

ASTM E562-19e1 is the standard test method for determining the volume fraction of a microstructural constituent by a systematic manual point count. The designation "19e1" indicates that the standard was originally approved or revised in 2019 and has undergone an editorial review (e1) to correct minor typographical or formatting errors without changing its technical substance. The Core Objective

The foundation of ASTM E562-19e1 lies in stereology—the multi-dimensional interpretation of three-dimensional structures from two-dimensional cross-sections.

standard provided the "gold standard" verification they needed.