APPLICATION OF POSITRON ANNIHILATION TO FATIGUE AND PLASTIC DAMAGE DETECTION IN SA508 AND TYPE 304 STEELS

The positron annihilation(PA) lineshape analysis method was applied to evaluate the fatigue damage in SA508 Ierritic steel and type 304 stainless steel, and the damage distribution in a type 304 sample plastically deformed by 3-point bending. The PA was found to be effective to detect early stages o...

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Bibliographic Details
Published in:Nondestructive testing and evaluation 1992-06, Vol.7 (1-6), p.83-91
Main Authors: UCHIDA, M., YOSHIDA, K., NAKAGAWA, Y.G., ALLEN, A.J., WHAPHAM, A.D.
Format: Article
Language:English
Subjects:
fatigue
plastic damage
position annihilation
steel
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Summary:The positron annihilation(PA) lineshape analysis method was applied to evaluate the fatigue damage in SA508 Ierritic steel and type 304 stainless steel, and the damage distribution in a type 304 sample plastically deformed by 3-point bending. The PA was found to be effective to detect early stages of the fatigue damage (less than 25% of the cycles to failure) in both SA508 and type 304. The S-parameter distribution measured by the PA across the 15% pre-strained type304 by 3-point bending should have a good agreement with the analytically expected strain distribution.
ISSN:1058-9759
1477-2671
DOI:10.1080/10589759208952990