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

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNX09CF78P
Agency Tracking Number: 080081
Amount: $99,836.00
Phase: Phase I
Program: STTR
Awards Year: 2009
Solicitation Year: 2008
Solicitation Topic Code: T9.01
Solicitation Number: N/A
Small Business Information
698 SW Port Saint Lucie Blvd, STE 105, Port Saint Lucie, FL, 34953-1565
DUNS: 114133213
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Bryant Walker
 Principal Investigator
 (772) 343-7544
Business Contact
 Bryant Walker
Title: Business Official
Phone: (772) 343-7544
Research Institution
 Mississippi State University
 Not Available
 210 Carpenter Engineering Bldg.
Mississippi State University, MS, 39762
 (662) 325-9154
 Domestic nonprofit research organization
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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