On the intergranular embrittlement of a solid-solution strengthened Fe-base alloy by internal oxidation
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High-temperature structural applications of solid-solution strengthened superalloys is largely based upon their potentially useful combination of properties particularly mechanical strength, environmental resistance, and ease of fabrications, e.g. . Typically, these alloys are supplied by the manufacturers in the solution-annealed condition with a given set of properties corresponding to characteristic microstructural features. Subsequent fabrication processes, however, can significantly alter the initial microstructure and properties. Therefore, an important consideration should be given to these effects in alloy selection as well as in assessing material performance. Also, the interaction between mechanical and chemical properties in certain environments should be taken into account.
For many furnace applications in the petrochemical industry, high-temperature alloys are used in the form of tubes where the desired length is produced by welding of individual sections. In such...
KeywordsIntergranular Fracture Internal Oxidation Intergranular Crack Intergranular Embrittlement Actual Service Condition
The support of the Research Institute of King Fahd University of Petroleum and Mineral is greatly appreciated.
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