Failure mechanisms of high temperature components in power plants

Article Abstract:

Integrity of power plant components at elevated temperatures is affected by creep and creep-fatigue resulting in their operational failure. Data also indicate that fracture toughness is also a critical factor in functional failure of the system. A discussion on the failure mechanism and means of predicting the same is presented.

Fatigue (Materials)

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Use of miniature specimens for creep-crack-growth testing

Article Abstract:

A procedure for measuring creep-crack-growth behavior in the Type 316 stainless steel, using miniature specimens, and its validation is described. Results reveal that the single-edge-notch-tension specimens of the steel weldments exhibit cracking blunting without creep crack growth and no change in the base plates.

Testing, Dynamic testing (Materials), Metals, Metals (Materials), Strength of materials, Strength (Materials), Metals, Effect of temperature on

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Creep rupture properties of high-temperature bainitic steels after weld repair

Article Abstract:

Results show that welding processes significantly affect the microstructure condition and its ability to withstand elevated temperatures. Data further indicate that the microstructures are heterogeneous and their heat-affected zones are sensitive to weld thermal cycles.

South Korea, Production processes, Cracking (Materials)

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