Research on Advanced Nondestructive Evaluation (NDE) Methods for Aerospace Structures
Abstract
Efforts were conducted to develop nondestructive acoustic and energy-dispersive x-ray spectroscopy techniques for quantitative determination of residual stress and depth-wise residual stress gradients in aerospace materials. Cross-correlation techniques were studied for precise determination of acoustic velocity as a function of frequency. Studies were conducted using eddy-current techniques with GMR sensors to determine their capabilities for detection and monitoring hidden corrosion in multi-layer aerospace structures. Nonlinear acoustic and eddy-current techniques with GMR sensors were used to optimize the retrogression and reaging process in AA7075-T6. Experimental eddy-current data was acquired to aid in development of a model of the eddy-current corrosion-characterization process. ATR-FTIR spectroscopy combined with White Light Interference Microscopy was studied for monitoring corrosion-preventive coatings. X-ray CT was used to monitor 3D corrosion growth. Acoustic emission was studied for its potential for nondestructively monitoring metalworking processes. Small projects were initiated in vehicle health monitoring.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 2004
- Accession Number
- ADA427336
Entities
People
- Brian Frock
- Edward Klosterman
- Jeffrey Fox
- Ray Ko
- Thomas Boehnlein
Organizations
- University of Dayton