Astm - E562-19e1

Below is a comprehensive guide to understanding, implementing, and reporting ASTM E562-19e1. What is ASTM E562-19e1?

The technician scans each point intersection on the grid across several fields of view and records how the points land:

-values must be pulled from standard statistical tables provided within the ASTM text. Relative Accuracy (

The Role of Manual Point Counting in Modern Metallurgy: A Study of ASTM E562-19e1 Introduction astm e562-19e1

[ V_V(field) = \fracP_pP_t \times 100 ]

: Measuring void volume fractions in additive manufacturing (3D printed metals) or cast components to predict structural failure.

Counted if the grid intersection falls cleanly inside the target phase. Relative Accuracy ( The Role of Manual Point

Adjust magnification so that grid intersections rarely fall on the same discrete particle.

Standardizes stereological point counting and related methods to quantify area/volume fraction (porosity, phase fraction) from 2D sections or micrographs.

: The year the standard was officially updated or reapproved (2019). astm e562-19e1

If a material has a banded microstructure (common in rolled steels), aligning the grid in the same direction as the bands can skew results. The standard advises using a rotated grid or a circular grid to randomize data collection and avoid bias caused by structural directionality. Why the "19e1" Designation Matters

ASTM E562-19e1 outlines a manual procedure called . Instead of calculating absolute surface areas, the test superimposes a distinct grid of points (typically crosshairs) over a series of microstructural images. By counting how many points land directly on a target phase versus the total number of grid points, operators determine a statistically representative volume fraction. Deciphering the Designation Code

The mechanical and physical properties of alloys—such as strength, ductility, and corrosion resistance—are directly linked to their microstructure. For instance: