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AbstractAbstract
[en] A method of reducing the ultrasonic noise, or spurious echos, often present in austenitic metals has been developed. The method has been used on specimens of Type 316 stainless steel, Alloy 800, 16-8-2 weld metal, and Inco-82 type weld metal. The method has been applied to shear wave tests and is applicable to longitudinal wave tests. Noise in these materials has been subsequently reduced relative to saw cut notches in welded samples. Signal-to-noise improvements of 8Db have been achieved in 16-8-2 weld metal, and order of magnitude improvement is obtained in the probability of large noise signals per inspection. Experiments with 1 and 1/2 megahertz inspection indicate that the improvement attributed to longitudinal wave inspection may be due to the difference in wavelength rather than wave mode
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Secondary Subject
Source
Aug 1979; 23 p; IEEE ultrasonics symposium; New Orleans, LA, USA; Aug 1979; CONF-790868--1; Available from NTIS., PC A02/MF A01
Record Type
Report
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Conference
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Country of publication
ACOUSTIC TESTING, ALLOYS, BOILERS, BREEDER REACTORS, CARBON ADDITIONS, CHROMIUM ALLOYS, CHROMIUM STEELS, CHROMIUM-NICKEL STEELS, CORROSION RESISTANT ALLOYS, EPITHERMAL REACTORS, EXPANSION, FABRICATION, FAST REACTORS, FBR TYPE REACTORS, HEAT RESISTING ALLOYS, INCOLOY ALLOYS, INCONEL ALLOYS, INSPECTION, IRON ALLOYS, IRON BASE ALLOYS, JOINTS, LIQUID METAL COOLED REACTORS, MANGANESE ALLOYS, MATERIALS TESTING, MOLYBDENUM ALLOYS, NICKEL ALLOYS, NICKEL BASE ALLOYS, NIOBIUM ALLOYS, NONDESTRUCTIVE TESTING, REACTORS, SOUND WAVES, STAINLESS STEELS, STEELS, TANTALUM ALLOYS, TESTING, TRANSITION ELEMENT ALLOYS, VAPOR GENERATORS
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