Composition Design and Damage Mechanism of Crystal Superalloys

Dear Colleagues,

Due to their excellent resistance to mechanical and chemical degradation, poly- and single-crystal superalloys are high temperature materials used in gas-turbine engines. The number of alloying elements in these alloys is usually greater than ten, and each element has a specific function for improving properties. Therefore, the composition design, on one hand, is always one critical aspect in developing the promising superalloys, which can perform excellently when serving at elevated temperatures. On the other hand, a long time service under harsh conditions, such as high temperature, high pressure, corrosive environment, and applied stress, could lead to damage in superalloys, which will result in the failure of component. Thus, the damage mechanisms of crystal superalloys is another key aspect.

The composition changes in designing the superalloys could lead to variations in the microstructure characterizations, such as the morphology, element distribution, phase constituents, etc., which will determine the performance and change damage modes of the alloys. Hence, the relationships among “composition design–microstructure characterization–damage mechanism” are interesting for the development of new superalloys with excellent performances.

In this Special Issue, we welcome articles that focus on the composition design and damage mechanism of crystal superalloys. Papers on material preparation methods, alloy and component behaviour, and final products’ performance are also encouraged.

Prof. Dr. Nan Wang
Guest Editor

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