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:
$99,836.00
Award Year:
2009
Program:
STTR
Phase:
Phase I
Contract:
NNX09CF78P
Award Id:
90875
Agency Tracking Number:
080081
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
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:
Bryant Walker
Principal Investigator
(772) 343-7544
bryant@keystonehq.com
Business Contact:
Bryant Walker
Business Official
(772) 343-7544
Research Institution:
Mississippi State University

210 Carpenter Engineering Bldg.
Mississippi State University, MS, 39762 6156
(662) 325-9154
Nonprofit college or university
Abstract
The Keystone and MSU team propose to demonstrate the feasibility of solid-state joining high strength and temperature alloys utilizing the Thermal Stir Welding process. The alloy selected for this proposed effort is Haynes 230; the alloy of choice typically utilized in rocket engine nozzel skirts. This class of alloys is difficult to fusion weld and has not been shown weldable by friction stir methods. Thus, the Keystone team is proposing to utilize the 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 parameter. By independently controlling and optimizing these two process parameters, the best metal working parameters can be identified and utilized to plasticize and stir the Haynes 230 alloy to achieve solid-state welding. 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.

* information listed above is at the time of submission.

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