Metallography


Metallography Lab

WMT&R's Metallographic Labs are designed to meet all common and specialized needs from lot release and material-overcheck testing to failure analysis and problem solving on test specimens, finished parts, and fasteners.

A major investment in Metallographic facilities has allowed us to incorporate all metallographic and analytical related activities into one state-of-the-art building. These specialized areas are the Metallographic Section, Analytical Department, Heat Treating Section, and the Stress Corrosion Testing Laboratory.

Our experienced technicians and metallurgists work closely with the analytical and physical testing groups to provide an overall view of material characteristics so that even the most difficult problems can be identified and solved quickly.

Conventional specimen preparation and automated polishing procedures using 1.25" to 2" diameter compression mounts ensure superior edge retention and flatness of specimens. Other methods include cold mounting and slot polishing.

Light microscopes and metallographs using conventional and inverted stages are used to characterize and photograph materials from 12X to 1200X for the following:

  • General Microstructure
  • Micro-cleanliness
  • Macro/Grain Flow
  • Carbide Distribution
  • IGA/IGO
  • Decarburization
  • Alloy Depletion
  • Casting/Mold Reactions
  • Dendritic Arm Spacing
  • Statistical Area/Shape Analysis
  • Weld Evaluations
  • Grain Size
  • Porosity/DAS
  • Alpha Case
  • Diffusion Layers
  • Carburization
  • Plating Thickness
  • Near Surface Conditions
  • Volume Fraction
  • Phase Transformation
  • Plus many other examinations

Our computerized image analysis system is used for fast and accurate statistical evaluation, as well as viewing of specimens with multiple observers at the same time. Digital photo pages are available in PDF, Standard Tiff, jpeg, and Bitmap single image formats for emailing.

Rockwell Hardness Tests using the latest instrumentation for quick, accurate results on all scales covered in ASTM E-18. We specialize in referee testing. Specialized test setups are available upon request. Jominy Hardenability is also performed.

Reliable Micro Hardness Testing per ASTM E-92 and ASTM E-384 is available using the Knoop and Vickers scales with capabilities from 10-grams to 10-kilogram loads. Automatic stage and automatic read features offer quick turnaround with computerized data transfer capabilities.

Brinell Hardness Testing from 500Kg to 3000Kg loads is also available.

Standard tests include: X-ray mapping, line scans, semi-quantitative analysis, contamination checks, fractography, alloy identity, and general photography up to 50,000X. Data and photographs are available in digital format to ensure maximum flexibility in electronic storage.

Failure Analysis facilities contain a Scanning Electron Microscope capable of viewing up to 100,000X. EDS X-ray analysis per ASTM E 1508 is available on site (including a light element detector) for identification of particles with dimensions of only a few microns!

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