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Quality Control for Advanced Residual Stress Inducing Surface Treatment Processes

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA8650-08-C-5200
Agency Tracking Number: F071-104-0013
Amount: $750,000.00
Phase: Phase II
Program: SBIR
Solicitation Topic Code: AF071-104
Solicitation Number: 2007.1
Timeline
Solicitation Year: 2007
Award Year: 2008
Award Start Date (Proposal Award Date): 2008-03-21
Award End Date (Contract End Date): 2010-07-21
Small Business Information
6145 Scherers Place, Dublin, OH, 43016
DUNS: 834959363
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 David W Sokol
 Director of Research
 (614) 718-3000
 dsokol@lspt.com
Business Contact
 Jeff Dulaney
Title: President and CEO
Phone: (614) 718-3000
Email: jdulaney@lspt.com
Research Institution
N/A
Abstract
Since the inception of laser peening, improved nondestructive test methods and sensors have been sought to ensure that laser peening produces the desired magnitude and depth profile of residual compressive stress in the part being treated. There are no reliable nondestructive evaluation (NDE) techniques generally applicable to any surface enhancement process to monitor residual stress, so it is important to have real-time process controls and monitors in place for these processes. Laser beam diagnostic sensors are used typically to verify that the correct laser pulse energy, temporal pulse width, and fluence spatial profile are delivered to the part for each laser spot applied. Test coupons, such as Almen strips, may be processed on a sampling basis, which provide a semi-quantitative measure of the effectiveness of laser peening. However, these techniques do not provide information measured from physical phenomena directly in the part during laser peening. Incorporating real-time process sensors, which monitor the laser beam interaction or the stress wave generated in the part on a spot-by-spot basis, will greatly reduce the probability of nonconforming process conditions. The real-time quality control system to be developed in this program will enable immediate corrective actions during processing, when needed.

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

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