Advanced Metalworking Solutions for
Naval Systems that Go in Harm's Way
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Semi-Solid Metalworking Technology for Titanium Fluid Handling Components

Objective

Develop semi-solid metalworking (SSM) technology to manufacture titanium or titanium alloy valve bodies.

Technical Approach

  • Identify titanium alloy systems that meet the Navy`s needs for corrosion resistance and strength, while also being compatible with the SSM process
  • Identify tooling materials capable of handling the temperatures and reactivity of molten titanium alloys
  • Develop numerical process modeling capabilities to assist in tooling and equipment design
  • Develop process equipment and process practices for manufacturing of valve components from selected titanium alloys

Benefits

If SSM can reduce the cost of manufacturing to that which is equivalent to copper-nickel, and with nearly 1000 valves of five inches or less required for the sea water and sewage systems, a savings between $1M-$5M per ship is anticipated.

Implementation

This project was stopped just prior to full completion due to a change in Navy priorities.

  • Three candidate titanium alloys had been identified with corrosion rates as low as 0.09 mils per year and elongations as high as 15%.
  • A controlled environment heating system was designed and fabricated for the processing of high-temperature and reactive materials by the SSM process. System integration was not completed.
  • Tooling for one prototype valve was designed and manufactured.

Status

Completed