Flaw location and characterization in anisotropic materials by ultrasonic spectral analysis
A method of quantitatively determining size and location of flaws in anisotropic materials such as stainless steel welds is described. In previous work, it was shown that spectral analysis of a broad band ultrasonic pulse scattered from a defect can be used to determine size and orientation in isotropic materials if the velocity of sound in the material is known. In an anisotropic structural material (stainless steel weld, centrifugal cast pipe), the velocity (both shear and longitudinal) is direction-dependent. When anisotropy is not taken into account, defect location and defect size estimation is misjudged. It will be shown that the effect of this structural variation in materials must be considered to obtain the correct size and location of defects by frequency analysis. A theoretical calculation, including anisotropy, of the scattered field from defects will also be presented.
- Research Organization:
- Oak Ridge National Lab., Tenn. (USA)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 6916950
- Report Number(s):
- CONF-780427-1; TRN: 78-013548
- Resource Relation:
- Conference: Conference of the American Society for nondestructive testing, New Orleans, LA, USA, 3 Apr 1978
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
42 ENGINEERING
STAINLESS STEELS
WELDING
WELDED JOINTS
ULTRASONIC TESTING
GEOMETRY
SPECTROSCOPY
ACOUSTIC TESTING
ALLOYS
CHROMIUM ALLOYS
CORROSION RESISTANT ALLOYS
FABRICATION
IRON ALLOYS
IRON BASE ALLOYS
JOINING
JOINTS
MATERIALS TESTING
MATHEMATICS
NONDESTRUCTIVE TESTING
STEELS
TESTING
360101* - Metals & Alloys- Preparation & Fabrication
420500 - Engineering- Materials Testing