Advanced Metalworking Solutions for
Naval Systems that Go in Harm's Way
blank

Single Crystal Fabrication Technology Initiative

Objective

Increase the operating temperature of jet engines through the use of formed, single crystal nickel-based superalloys.

Technical Approach

  • Select the alloy(s) that meet the property requirements for improved engine performance
  • Determine the casting and forming process parameters that provide the engine components (rotor and combustor) that satisfy the new specifications and still maintain the single crystal properties in these components
  • Fabricate prototypes for spin and engine acceptance testing

Benefits

The utilization of single crystal components will effect a temperature increase between 100–150 °F, which translates to raising the engine thrust by 25–30 percent. Considering the cost of a conventional "fir tree" single crystal bladed rotor, it is estimated that a cost savings of 25–30 percent will be realized.

Implementation

The NCEMT`s job was to integrate this unique technology into the redesign of the F107-WR-402A engine used in the Tomahawk Missile. Although the project was successful in achieving the technical goals, implementation into fleet usage was prevented when a decision was made to use a totally new and smaller Tactical Tomahawk, which uses a smaller engine.

Status

Completed