TITLE

Neutron and ultrasonic determination of residual stress in an aluminum ring-plug

AUTHOR(S)
Prask, H. J.; Gna¨upel-Herold, T.; Clark, A. V.; Hehman, C. S.; Nguyen, T. N.
PUB. DATE
May 2000
SOURCE
AIP Conference Proceedings;2000, Vol. 509 Issue 1, p1629
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Stress is a principal cause of material failure. This has been a well-recognized problem for decades, yet—in general—neutron diffraction remains the only way to measure sub-surface residual stresses without destroying the component. A field-portable ultrasonic strain-meter is being developed at NIST (Boulder) to determine residual stresses in engineering specimens, nondestructively. To test this and other techniques an array of stress-measurement standards are being prepared. These will be characterized by neutron diffraction and then used to evaluate, quantitatively, the potential of new methods. The first standard specimen produced for this purpose is a large shrink-fit ring-plug of 2024 aluminum (305 mm OD, 25.4 mm thick, 101.6 mm diameter plug). Because of large grain size, a sample-rotation averaging technique was developed to make reliable neutron measurements possible. A comparison of the neutron diffraction and ultrasonic results for this specimen will be presented, along with strain gauge results. © 2000 American Institute of Physics.
ACCESSION #
6029210

 

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