Development of an acoustic emission monitor and monitoring techniques for long-term monitoring of U-0. 8Ti electron-beam weldments for postweld cracking

Technical Report · Wed Jul 01 00:00:00 EDT 1987

OSTI ID:5982104

Whittaker, J W; Richey, M W

An acoustic emission (AE) monitor and data analysis techniques have been developed for long-term monitoring to detect delayed weldment cracking. The monitor, which comprises multiple identical channels of standard electronic instruments, is capable of measuring the total AE activity in a weldment and the relative energy content of individual AE pulses. The monitor was used to detect the onset of hydrogen-assisted cracking (HAC) in U-0.8Ti electron-beam weldments. Use led to the conclusions that the monitor is adequate to study delayed-cracking phenomena, such as HAC; weldments of the U-0.8Ti alloy do produce AE after welding and intensive AE production coincides with the appearance of macrocracks and their extension; the time-dependency of HAC can be determined from the AE record; and the monitor is a valuable tool for studies of delayed-cracking behavior, such as HAC and stress-corrosion cracking. Recommendations are made to upgrade the monitor to enhance utility and data analysis efficiency and to use the monitor in stress-corrosion cracking studies. The monitor is in regular use on continuing studies of HAC in several alloys. 3 refs., 4 figs.

• Research Organization: Oak Ridge Y-12 Plant, TN (USA)
• DOE Contract Number: AC05-84OS21400
• OSTI ID: 5982104
• Report Number(s): Y-2387; ON: DE88000819
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
36 MATERIALS SCIENCE
ACOUSTIC EMISSION TESTING
URANIUM ALLOYS
WELDED JOINTS
CALIBRATION
CRACKS
ELECTRON BEAM WELDING
NOISE
TITANIUM ALLOYS
ACOUSTIC TESTING
ACTINIDE ALLOYS
ALLOYS
FABRICATION
JOINING
JOINTS
MATERIALS TESTING
NONDESTRUCTIVE TESTING
TESTING
WELDING
420500* - Engineering- Materials Testing
360103 - Metals & Alloys- Mechanical Properties