thermal fatigue

thermal fatigue

thermal fatigue
Stages of thermal fatigue or blade creep on a typical turbine blade. In the primary stage the initial rate of creep decreases rapidly, in secondary stage the rate decreases more slowly or may be substantially constant and in tertiary stage, the rate increases rapidly and leads eventually to fracture.
A kind of metal fatigue caused by repeated heating and cooling. It is prominent in turbines where some heating or cooling takes place each time a power setting is changed. Also called creep damage. See also creep (ii).
References in periodicals archive ?
The new EGR solution offers high robustness against thermal fatigue and enhanced coolant distribution for durable performance even with minimum coolant flow, while reducing NOX emissions.
New alloys have been developed using a variety of elements and micro-alloys, which minimize this phenomena and create an alloy with superior thermal fatigue resistance and mechanical strength.
A common failure that aging HVAC systems suffer in fall and winter months is the breakdown of the heat exchanger because of thermal fatigue.
In consequence, thermal load for EGR coolers has been increasing and the interaction of boiling with thermal fatigue is now a critical issue during development.
It is generally believed that under the thermal shock/fatigue load, thermal cracks would nucleate on the surface of the material and cause thermal fatigue failure through crack propagation.
It also avoids costly receiver tubes that undergo thermal fatigue and can bring the entire system down with the smallest of leaks.
In addition, gold-based solders are resistant to corrosion, provide superior thermal fatigue resistance, and exhibit excellent joint strength.
Li, "Study of the thermal fatigue crack initial life of H13 and H21 steels," Journal of Materials Processing Technology 74, pp.
The effectiveness of a coating can be compromised as a result of degradation due to thermal fatigue, shock, cycling, and long-term exposures to peak temperatures, according to MeLampy.
Thermal fatigue is one of the most important properties in materials used as automobile's exhaust parts, particularly near the hotter manifold section.
In jet engine use, single-crystal turbine airfoils have proven to have as much as nine times more relative life in terms of creep strength and thermal fatigue resistance and over three times more relative life for corrosion resistance, when compared to equiaxed crystal counterparts.