Advanced Metalworking Solutions for
Naval Systems that Go in Harm's Way
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Knowledge Integrated Aging Process for Turbine Airfoils

Objective

Reduce cost of superalloy turbine airfoils for military jet engines by optimizing the aging process.

Technical Approach

Assess the effects of thermal variations on the microstructure and mechanical properties of turbine airfoils using design of experiments (DOE) statistical method * Define the relationship between process, microstructure, and properties * Develop appropriate tools for predicting the microstructure and mechanical properties as a function of thermal history * Integrate findings into a methodology for optimizing the aging process

Benefits

The procurement cost of turbine engine components is projected to be reduced by $4.5 million for alloy René N5 over engine lifetime. The mechanical properties and the reliability of these components will be significantly increased.

Implementation

An integrated project team consisting of General Electric Aircraft Engines (F414 engine manufacturer), PCC Airfoils (casting vendor), Westmoreland Testing and Research, Inc. (engine manufacturer’s qualified testing vendor) and the National Center for Excellence in Metalworking Technology (NCEMT) was assembled to transition the project results into the manufacture of F404/F414 components. Technical reports, draft process specifications, and presentations at the NCEMT Aerospace Material Workshop will be used to transition the technology to industry at large.

Status

Completed