Field Repair of Localized Damage on Dynamic Rotorcraft Components.

Award Information
Agency: Department of Defense
Branch: Army
Contract: W911W6-08-C-0067
Agency Tracking Number: A072-009-2278
Amount: $1,910,520.00
Phase: Phase II
Program: SBIR
Awards Year: 2008
Solicitation Year: 2007
Solicitation Topic Code: A07-009
Solicitation Number: 2007.2
Small Business Information
7067 Old Madison Pike, Suite 170, Huntsville, AL, 35806
DUNS: 804859841
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Charles Petersen
 Principal Investigator
 (256) 721-7006
Business Contact
 Lawrence Day
Title: VP, Chief Operating Offic
Phone: (256) 721-7006
Research Institution
U.S. Army helicopter fatigue sensitive dynamic components are required to maintain structural integrity throughout their operational life cycle. Typical metal alloy fatigue sensitive dynamic components require the presence of surface compressive residual stresses to inhibit the initiation and propagation of fatigue cracks. However, some of these components are susceptible to localized mechanical and corrosion surface damage that must be removed by blending. The surface blending process results in the requirement to reintroduce compressive residual stresses, normally by shot peening. The shot peening operation is currently performed at military depots and commercial facilities using non-portable peening equipment. Army Aviation has the potential for increasing reliability, availability, and maintainability (RAM), while reducing Operation & Support (O&S) cost by deploying a portable capability to reliably restore the structural integrity of fatigue sensitive dynamic components that have experienced usage related surface defects. Avion (Prime) and Sonats (Sub) have teamed to demonstrate the feasibility of developing a portable, field-deployable Stressonic® shot peening capability that reliably reintroduces compressive residual stresses in Army helicopter fatigue sensitive dynamic components that have had localized surface damage blended out.

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

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