Electrochemical fatigue crack sensor

The EFS™ relies on a patented electrical test [2][3] method, which monitors the current flow at the surface of a metal while it is being mechanically flexed.

The output current resembles a heart’s EKG pattern and can be interpreted to indicate the degree of fatigue as well as the presence of cracks in their earliest stages of development.

Since that time, additional research and development has resulted in the adaptation of the EFS system for steel bridge inspection.

The system subsequently monitors changes in the current response that results from the exposure of fresh steel during crack propagation.

An algorithm, specifically written for this system, automatically indicates the level of fatigue crack activity at the inspection location.

[citation needed] The original research for the EFS was aimed at developing a technology for detecting problem cracks in airframes and engines.

[5] Grade 5, also known as Ti6Al4V, Ti-6Al-4V, or Ti 6-4, is the most commonly used titanium alloy in the aerospace industry, such as internal combustion engine connecting rods.