Nickel-based alloys are used for gas turbine blades in aerospace engines. Briefly discuss the characteristics that make these alloys the choice for this application. Single-crystal technology is...

Extracted text: Nickel-based alloys are used for gas turbine blades in aerospace engines. Briefly discuss the characteristics that make these alloys the choice for this application. Single-crystal technology is applied to nickel alloys that are used as gas turbine blades in aerospace engines. With the aid of sketches describe how a single-crystal casting can be manufactured and explain why a single-crystal casting is likely to have superior creep resistance than a directly-solidified one. Demonstrate the application of the Ten-percent Rule by calculating the approximate tensile strength and elastic modulus in the 0° direction of a carbon-fibre reinforced polymer composite if the strength and elastic moduluş in the 0° single ply are 3620 MPa and 143 GPa respectively. The lay-up sequence of the composite is [02/+45/-45/902]s.