Low Cycle Fatigue (LCF) Testing

Low cycle fatigue (LCF) is low-cycle endurance testing, where components are subject to mechanical cyclic plastic strains that cause fatigue failure within a short number of cycles. Element provides testing to a number of industry specifications including ASTM E606, the standard test method for strain-controlled fatigue testing.

Fatigue testing measures how cyclic forces will affect a product or material over time, using varying loads, speeds and environmental conditions. Our fatigue test methods, like low cycle fatigue, are useful for simulating specific scenarios and investigating real-world failures.

LCF Testing per ASTM E606

Before testing, the subject material is first machined and longitudinally polished or ground into cylindrical or flat test specimens with a uniform-gage section. The samples are then loaded into a tension-compression endurance testing machine and subject to repeated stress under a constant strain rate in accordance with ASTM E606. Extensometers are used to control strain range by measuring deformation in the gage section of the specimen.

Typical low cycle fatigue tests are targeted to run no more than 100,000 cycles. Test frequency ranges between 0.25 Hz and 5 Hz, depending on material and requirements. 

By testing multiple specimens at varying strain levels, S/N or strain-life curves can be developed for the material. ASTM E606 recommends testing at least ten samples to gain statistical confidence in strain-life curves.

The Element Advantage

Element has the unique capabilities required to provide comprehensive low cycle fatigue testing and results, from raw material blanking and specimen machining to precision data acquisition and reliable, comprehensive test reports.

For more information about our low cycle fatigue testing or to request a quote, contact us today.