ASTM E562-19 is based on the fundamental stereological principle that a two-dimensional areal fraction or a linear intercept fraction of a phase is an unbiased estimator of its three-dimensional volume fraction.
: The intersection point lands exactly on a phase boundary line. 0.0 Count : The point falls outside the target phase. 3. Handling Microstructural Anisotropy
Detailed guidelines on calculating and reporting statistical uncertainty. Acceptance criteria for microstructural analysis.
To ensure compliance with industrial quality management systems (like AS9100 or TS16949), the official PDF should be purchased directly from:
Understanding this standard ensures accurate material verification, especially when determining phases like ferrite in duplex stainless steels or pearlite in linepipe steels. What is ASTM E562-19?
ASTM E562-19 outlines a standardized manual point-counting method for determining the volume fraction of constituent phases in materials using a 2D microstructure image, including specific rules for handling grid intersections. The technique ensures statistical precision through a 95% confidence interval and is commonly applied to determine the ferrite content in steels. Purchase the full standard or view redlines at the ASTM International website.
The document can be purchased and accessed through ASTM International , AFNOR , or Intertek . If you'd like, I can:
[ V_V = \fracP_PP_T ]
Suitable for opaque specimens (metals, ceramics, composites). 2. Key Aspects of the E562-19 Revision
Operators often default to counting boundary points as a full 1.0 instead of 0.5. Train technicians to strictly apply the half-point rule.
