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Q. Expected service life of a component in high temperature environment?
The expected service life of a component in a high temperature environment is limited by either the materials' mechanical or metallurgical properties. Mechanical failure involves excessive creep of the material over time. Metallurgical failure involves the reaction of the material with its environment (e.g. oxidation, sulphidation, and other forms of high temperature corrosion) and the gradual modification of the microstructure in service.
In general, many cast alloys offer superior creep strength to their wrought counterparts above a certain temperature. However, other mechanical properties may be inferior. The reason for the superior creep strength is associated with both grain size and slight microstructural differences.
Why is porter governor more sensitive than Watt Governor even the former has got an additional weight which will require more force to move sleeve than Watt governor?
Objectives After studying this section, you should be capable to: known properties that are essential to be present in a material for high temperature applications,
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