What the component does
Grain comparison, inclusion assessment and point counting use different reference geometries. Choose the reticle around the measurement task.
Metallography & Material Microstructure
Apply a consistent visual or sampling reference when evaluating prepared material microstructures.
Where the component works
Set the reference scale for the micrograph
- Comparison reticle in the eyepiece
- Known length at the specimen plane
- Prepared microstructure under observation
The calibration sketch shows the length reference; replace it with the prepared specimen for assessment.
Match the reference to the assessment task
- Grain boundaries in a prepared field
- Test line crossing grain boundaries
- Other microstructural features
Grain intercepts, inclusion comparison and phase point counts are different methods and should not share an assumed interpretation.
How the system works together
Specimen preparation and contrast must reveal the features to be assessed. Set the magnification and field sampling according to the selected method.
What an unsuitable choice changes
Using a grain-size chart to rate inclusions confuses different quantities. Poorly revealed boundaries can affect a result even with a correct reference pattern.
Components for this application
Grain-Size Comparison Reticles
Comparison patterns for method-defined grain-size examination.
Inclusion Assessment Reticles
Reference layouts for non-metallic inclusion assessment.
Point-Counting Reticles
Point probes for area-fraction sampling.
Other relevant products and configurations
Stereology Test-Line Reticles
Test-line geometries for quantitative analysis.
Principles and selection details
System context
A prepared material section reveals boundaries, phases and inclusions under a microscope. Reference patterns help compare these features systematically. Grain size, inclusion assessment and phase fraction answer different questions and require different observation or statistical methods.
Selection considerations
Choose the required analysis method first. Grain-comparison layouts relate to reference structures, intercept patterns support line-based analysis, and point arrays support sampling of area fractions. A supplier pattern name alone does not establish compatibility with a standards edition.
Separate grain size from inclusion ratings
ASTM E112 concerns average grain size, while ASTM E45 and methods such as ISO 4967 address non-metallic inclusions in steel. Some source catalogues label both as grain-sizing reticles. Product descriptions should identify the actual measurement task and the approved comparison artwork.
Representative fields and preparation
Polishing and appropriate etching expose the structure for the selected method. Sampling only a convenient field can bias the result. Keep reference magnification, field-selection rules and interpretation consistent when comparing materials or process conditions.
Related applications
Planning your project
Metallography uses grain references, inclusion patterns, test lines or points according to the assessment task.
Define the reported quantity first, then match preparation, magnification, sampling and interpretation method.
Can a grain-comparison pattern be used for inclusion grading?
The structures and assessment methods differ. Choose the corresponding reference artwork rather than assuming similarly named reticles are interchangeable.