Thermal Stir Welding of High Strength and High Temperature Alloys for Aerospace Applications

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$599,891.00
Award Year:
2010
Program:
STTR
Phase:
Phase II
Contract:
NNX10CB70C
Award Id:
90875
Agency Tracking Number:
080081
Solicitation Year:
n/a
Solicitation Topic Code:
T9
Solicitation Number:
n/a
Small Business Information
698 SW Port Saint Lucie Blvd., Suite 105, Port Saint Lucie, FL, 34953
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
114133213
Principal Investigator:
BryantWalker
Principal Investigator
(772) 772-7544
bryanthwalk@aol.com
Business Contact:
BryantWalker
President
(772) 343-7544
Research Institute:
Mississippi State University

P.O. Box 6156
Mississippi State, MS, 39762
(662) 325-7396

Abstract
The Keystone and MSU team propose to build on the successful feasibility demonstration conducted during Phase I to complete the development of solid-state joining of high strength and temperature alloys utilizing the Thermal Stir Welding process. The focus alloy for this project is Haynes 230; the alloy of choice typically utilized in rocket engine nozzel skirts. This class of alloy is difficult to fusion weld and with the successful Phase I demonstratipon has now been shown weldable using solid-state methods. Therefore, the Keystone team is proposing to utilize a Thermal Stir Welding process; a solid-state welding process that decouples the stirring and heating features of the process to enable optimization of each key process parameter. By independently controlling and optimizing these process parameters, the best metal working parameters can be established and utilized to plasticize and stir the Hanyes 230 alloy. Achievement of this objective will enable superior mechanical properties in the weld joint and thus maximize the capability of the weld for the intended application. During Phase II the Keystone team will complete process development and demonstrate TRL-4 readiness by producing a 24" diameter subscale nozzel skirt for testing and evaluation by NASA.

* information listed above is at the time of submission.

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