Analytical Services: Metallography
Opaque object microscopy, coating thickness, plating, case hardness and depth, grain size, corrosion analysis, heat treat verification, fracture morphology and more.
This is the technique used to examine the internal structure of a material. These structures are known as crystals [in organics] or grains [metals]. The appearance of this "microstructure" is a key to failure analysis and understanding mechanical behavior. Laboratory techniques like microscopy, spectroscopy and x-ray diffraction are combined with a thorough knowledge of thermodynamics, engineering metallurgy, polymer chemistry and applied mechanics to understand and explain the behavior of the materials. This scientific understanding is balanced by real-world understanding of manufacturing and design applications.
Metallographic Testing Applications:
- Coating thickness
- Weld and heat affected zone examinations
- Microhardness
- Plating thickness & adhesion
- Grain size
- Corrosion analysis
- Heat treating including case depth and hardness
- Fracture morphology
- Extent & size of porosity
- Inclusion content (non-metallic...)
- Intergranular attack (IGA) and intergranular oxidation (IGO)
- Phase identification
- Extent of cold working
Latest Resources
- June 25, 2009 - Case History: Wind Turbine Manufacturer –
Case history from Metallurgical Department of NHML.
- June 25, 2009 - Case History: Serrated Austenitic Screws – Case history from Metallurgical Department of NHML
- June 25, 2009 - Case History: Weld Exams – Case history from Materials Department of NHML
- June 25, 2009 - Applied Chemistry: Metals
Latest Newsletters
- April 1, 2008 - Nuts & Bolts, Volume 25 – Glass Vial Sprinkler Accidents & Passivation
- April 1, 2007 - Nuts & Bolts, Volume 24 – Embrittlement of Steels
- May 1, 2006 - Nuts & Bolts, Volume 23 – Hydrolysis of Fiberglass
- June 1, 2005 - Nuts & Bolts, Volume 22 – High Cycle Fatigue