Nonlinear Time Reversal Acoustic Method of Friction Stir Weld Assessment

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNX09CE85P
Agency Tracking Number: 084678
Amount: $99,990.00
Phase: Phase I
Program: SBIR
Awards Year: 2009
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
1753 Linvale Harbourton Road, Lamberville, NJ, 08530
DUNS: 959147026
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Armen Sarvazyan
 Principal Investigator
 (609) 333-0710
 armen@artannlabs.com
Business Contact
 Noune Sarvazyan
Title: Business Official
Phone: (512) 996-8565
Email: nsarvaz@artannlabs.com
Research Institution
N/A
Abstract
The goal of the project is demonstration of the feasibility of Friction Stir Weld (FSW) assessment by novel Nonlinear Time Reversal Acoustic (TRA) method. Time reversal acoustic focusing provides the means to concentrate sound energy at any point in a material, inducing elastic nonlinear effects in the focal area. The level on nonlinearity depends on crack and defect presence and measurements of nonlinear effects in TRA focused wave are the basis of the proposed Nonlinear TRA NDE method. This method is especially sensitive to detection of kissing bond that is difficult to detect by other methods. The experimental setups for measurements of local nonlinearity in FSW will be developed and results of the measurements will be compared with the standard weld NDE methods including dye penetrant, radiographic and ultrasonic inspection.

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

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