Standard Test Method for Determining the Volume Fraction by Systematic Manual Point Count

Comprehensive Guide to ASTM E562-19e1: Standard Test Method for Determining Volume Fraction by Systematic Manual Point Count

uses ASTM E562-19 to analyze martensite content in samples heat-treated at varying intercritical temperatures. Forging Outcomes of Cast Titanium Aluminide : Published in MDPI Metals

By calculating the ratio of points landing on the target phase to the total number of points across multiple fields of view, the volume fraction can be accurately determined. The Methodology: A Step-by-Step Overview

It was a subtle difference, invisible to the lazy eye, but catastrophic to physics. At 1.8%, the brittle oxides were no longer isolated islands; they had formed a percolating network—a hidden web of weakness running through the "unbreakable" steel.

Vv≈Aa=PpPtcap V sub v is approximately equal to cap A sub a equals the fraction with numerator cap P sub p and denominator cap P sub t end-fraction Vvcap V sub v = Volume Fraction Ppcap P sub p = Number of points hitting the constituent Ptcap P sub t = Total number of test points in the grid 3. The Procedure: ASTM E562-19e1 Step-by-Step