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Fabrication of Imitative Stress Corrosion Cracking Specimens for the Development of Nondestructive Evaluation Techniques

update:2019-01-18
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Features
The emergence of stress corrosion cracking is one of the most important issues from the viewpoint of aging management and maintenance of nuclear power plants. There is a large discrepancy between stress corrosion cracking and other cracks such as fatigue cracks from the viewpoint of nondestructive testing and evaluations, which requires suitable specimens containing stress corrosion cracking for the development of nondestructive testing and evaluation techniques and also for personnel training. However, artificially introducing stress corrosion cracking needs large cost and long time. Furthermore, several studies have pointed out that such articial stress corrosion cracking is not always similar to natural ones. On the basis of the background above, we develop a method to fabricate "imitative" stress corrosion cracking specimens using diffusion bonding.

Targeted Application(s)/Industry
The method enables one to introduce a region whose response is almost identical to actual stress corrosion cracking from the viewpoint of nondestructive testing. Whereas the dimension of the region is accurately controllable, the method requires much less cost and time comparing the conventional ones using corrosive environment. Patent is already applied for.

Researchers

Department of Quantum Science and Energy Engineering , Graduate School of Engineering

YUSA, Noritaka , Associate Professor
Doctor of Engineering

Keywords

Related Information

Patents
Japanese patent No.5392779

Publications
An accurately controllable imitative stress corrosion cracking for electromagnetic nondestructive testing and evaluation [Nuclear Engineering and Design 245 (2012), 1-7.]
Fabrication of imitative stress corrosion cracking specimen using lithography and solid state bonding [International Journal of Applied Electromagnetics and Mechanics 39 (2012), 291-296.]
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