Tribology, Mark Douglas Bell, PE, Consulting Metallurgical Engineer, San Diego, California, USA Bell Metallurgy
Metallurgical Failure Analysis
3568 Caminito El Rincon, #93
San Diego, California, 92130
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209 367-1398 - Email: bell.metallurgy@gmail.com



Mark Douglas Bell, PE
Consulting Metallurgical Engineer

Wear and Tribology



Tribology is a science of surfaces in contact. Motion between the surfaces can range from high speed bearings to slight vibration, fretting, between a high strength fastener and its faying surface. Even more than corrosion, tribology effects are limited to the surface. Metallurgical Failure Analysis has expertise in identifying and solving problems in tribology and wear. Lubrication Engineering is an important technology used to solve some aspects of wear failures. Metallurgical Failure Analysis knows how to select materials to resist wear.

Identifying the type of wear is key in solving the wear problem. Metallurgical Failure Analysis has expertise on solving problems in wear failures.

The image above illustrates erosion corrosion. Metal loss inside of a nipple, red brass.
The image at right shows erosion/corrosion of a vertical pump impeller.

Tribology, Mark Douglas Bell, PE, Consulting Metallurgical Engineer, San Diego, California, USA Common types of wear are:
  • Abrasion
  • Adhesion
  • Scuffing
  • Galling
  • Fretting (False Brinelling)
  • Erosion/Corrosion
  • Contact Fatigue
  • Subsurface Fatigue, (Sliding and Rolling)
  • Cavitation Damage


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Installed September 26, 2009, Last Revised July 7, 2017 - Hosted and maintained by Don Robertson