Metallographic Exam

A metallographic exam utilizes inverted optical light for inspection of a material microstructure, grain sizing, and can provide clues to the origin of a metal failure. Our team of experienced metallurgists work with modern camera systems to capture material microstructures, flaws, and abnormalities, which may be critical to preventing future failures.

Metallographic examination is typically performed on polished cross sections, which may be etched to bring out the structure of the material by selectively corroding grain boundaries. Metallographic exam is often a critical tool for characterizing the extent of cracks and pits. Additionally, this inspection is used to characterize post processing changes due to casting, forging, machining, welding, heat treating and coating.

Metallographic examination is performed by using state of art optical microscope equipped with a PAXcam™ III digital camera and image analysis software. Scanning electron microscope can be employed when higher resolution and micro-chemical analysis are required.

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  • Grain size analysis
  • Particle size/distribution
  • Coating thickness and case depth
  • Inclusion rating
  • Ferrite/pearlite percentage
  • Porosity
  • Grain flow pattern
  • Phase area fraction
  • Flake size classification
  • Nodularity
  • ASTM E3
  • ASTM E112
  • ASTM E45
  • ASTM 1077
  • ASTM 1268
  • ASTM A247
  • Up to 10″ diameter cross section; typically <1.25″ section