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.
thermal fatigue failure, rather than mechanical fatigue failure).
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.
