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Bi-Metallic Additive Manufacturing Close-Out of Coolant Channels for Large Liquid Rocket Engine (LRE) Nozzles

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNX16CM41P
Agency Tracking Number: 150204
Amount: $124,774.00
Phase: Phase I
Program: STTR
Solicitation Topic Code: T12.04
Solicitation Number: N/A
Solicitation Year: 2016
Award Year: 2016
Award Start Date (Proposal Award Date): 2016-06-10
Award End Date (Contract End Date): 2017-06-09
Small Business Information
664 Northwest Enterprise Drive, Suite 118
Port Saint Lucie, FL 34953-1565
United States
DUNS: 000000000
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Bryant Walker
 Principal Investigator
 (772) 343-7544
Business Contact
 Bryant Walker
Title: President
Phone: (772) 343-7544
Research Institution
 University of Alabama at Hunstville
 Gloria Greene
301 Sparkman Drive
Huntsville, AL 35899-0001
United States

 (256) 824-2657
 Domestic Nonprofit Research Organization

This NASA sponsored STTR project will investigate methods for close-out of large, liquid rocket engine nozzle, coolant channels utilizing robotic laser and pulsed-arc additive manufacturing methods. Copper to Nickel alloy interface strength will be quantified and metallurgical characterization completed. A thermal model based on Rosenthal?s analytical expression for a moving heat source, which has been incorporated into a numerical model with provision for adding mass, will be used to predict thermal profiles for AM of the close out. The model will be verified and validated for different material combinations investigated in this study. Keystone will also investigate high temperature stability of the interface Cu-to-Ni layer through thermal treatments. After application of Ni layers and the thermal treatments at varying temperature and times, X-ray diffraction (XRD) will be used to document phases present and analyzed for formation of potential detrimental effects.

* Information listed above is at the time of submission. *

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