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What is thermal fatigue?

written 6.3 years ago by atharvinamdar • 830

modified 5.2 years ago by sanketshingote • 100

material technology

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written 6.3 years ago by atharvinamdar • 830

•   modified 6.3 years ago

1. Thermal fatigue is a specific type of fatigue failure mechanism that is induced by cyclic stresses from repetitive fluctuations in the temperature of equipment.
2. The degree of damage is affected by the magnitude and frequency of the temperature swings. Damage typically appears in the form of one or more cracks at the surface of the component.
3. Unless remedied, cracks may propagate through the material eventually leading to failure.
4. The best way to prevent failure due to thermal fatigue is to minimize thermal stresses and cycling in the design and operating of equipment.
5. All materials of construction and several types of units and equipment can be affected by thermal fatigue. A few include:

• Hot and cold stream mixing points
• Areas where condensate and steam systems contact each other
• Steam generating equipment
• High temperature superheater and reheater tubes

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