Role of microstructure in ultrasonic inspectability of austenitic stainless steel welds
The behavior of ultrasonic waves in welded austenitic stainless steel plates with various base-metal microstructures was characterized. The tests were conducted in 15 and 80 ..mu..m grain-diameter annealed plates, in sensitized plates, and in cast plates with elongated grains of strong (100) preferred orientation. In the plates of preferred orientation, longitudinal sonic velocity provided an indication of crystalline anisotropy. For all microstructural conditions, ultrasonic attenuation measurements and spectral analysis indicated that maximum signal strength and flaw detectability were obtained at test frequencies below 3 MHz. Finally, it was determined that shear waves polarized in specific directions under certain conditions could provide better flaw detectability than longitudinal waves.
- Research Organization:
- Argonne National Lab., IL
- OSTI ID:
- 6552387
- Journal Information:
- Mater. Eval.; (United States), Journal Name: Mater. Eval.; (United States) Vol. 36:5; ISSN MAEVA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360102* -- Metals & Alloys-- Structure & Phase Studies
42 ENGINEERING
420500 -- Engineering-- Materials Testing
ACOUSTIC TESTING
ALLOYS
CASTING
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CRYSTAL STRUCTURE
DEFECTS
FABRICATION
GRAIN SIZE
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
JOINTS
MATERIALS
MATERIALS TESTING
MICROSTRUCTURE
NICKEL ALLOYS
NONDESTRUCTIVE TESTING
SIGNALS
SIZE
SOUND WAVES
STAINLESS STEEL-304
STAINLESS STEEL-305
STAINLESS STEELS
STEELS
TESTING
ULTRASONIC TESTING
ULTRASONIC WAVES
WELDED JOINTS