Navy vehicles: acoustic emission related to nondestructive testing. Final report, 1980-1987
This investigation was aimed at studying acoustic emission for applications to residual stress measurements and for the evaluation of structural integrity of engineering structures. Effects of microstructure, composition and prior cold working on magnetomechanical acoustic emission(MAE) have been studied. Magnetization behavior, magnetostriction and Barkhausen noise are affected by stress as well as other parameters. These responses have been measured simultaneously in order to identify the stress level uniquely. Combinations of advanced signal analysis methods and MAE measurements have been studied to identify the optimum parameters for applications. This work has established mechanisms of MAE signal generation, effects of various parameters that influence the MAE behavior of materials and signal processing techniques that allow materials characterization via MAE. Included are neutron-irradiated reactor-vessel steels, large-size steel plates as well as single crystals of various ferromagnetic metals and alloys. In the second part of this study, acoustic emission from materials undergoing plastic deformation and fracture were examined in an attempt to improve detection capability of the impending structural failure. Acoustic emission characteristics of reactor-vessel steels, advanced aluminum alloys and metal and ceramic-matrix composite materials have been evaluated in detail.
- Research Organization:
- California Univ., Los Angeles (USA). Dept. of Materials Science and Engineering
- OSTI ID:
- 7003101
- Report Number(s):
- AD-A-191965/3/XAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
COMPOSITE MATERIALS
ACOUSTIC EMISSION TESTING
FERROMAGNETIC MATERIALS
REACTOR VESSELS
STEELS
COLD WORKING
DETECTION
ENGINEERING
MAGNETIZATION
MAGNETOACOUSTICS
MAGNETOSTRICTION
MATRIX MATERIALS
MICROSTRUCTURE
OPTIMIZATION
PROGRESS REPORT
RELIABILITY
SIGNALS
ACOUSTIC TESTING
ACOUSTICS
ALLOYS
CONTAINERS
CRYSTAL STRUCTURE
DOCUMENT TYPES
FABRICATION
IRON ALLOYS
IRON BASE ALLOYS
MAGNETIC MATERIALS
MAGNETIC PROPERTIES
MATERIALS
MATERIALS TESTING
MATERIALS WORKING
NONDESTRUCTIVE TESTING
PHYSICAL PROPERTIES
TESTING
420500* - Engineering- Materials Testing
360103 - Metals & Alloys- Mechanical Properties
360603 - Materials- Properties