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Vol.3 No.4 previous AA 37 -38- NT 44 -45

Academic Articles
Regular Paper Vol.4No.1 (2012) p.1 - p.21
 

Study on the Ultrasound Propagation in Cast Austenitic Stainless Steel

 
Kazunobu SAKAMOTO1, * Takashi FURUKAWA2, Ichiro KOMURA2, Yoshinori KAMIYAMA2, and Tsuyoshi MIHARA3
 
1Japan Nuclear Energy Safety Organization, 4-1-28, Toranomon, Minato-ku, Tokyo, 105-0001, Japan
2Japan Power Engineering and Inspection Corporation, 14-1, Benten-cho, Tsurumi-ku, Yokohama, 230-0044, Japan
3University of Toyama, 3190 Gofuku, Toyama-shi, Toyama,930-8555, Japan.
 
Abstract
It is challenging to inspect cast austenitic stainless steel (CASS) piping weld by ultrasonic testing (UT) techniques due to its coarse and anisotropic grain structures resulted from manufacturing process.
To comprehend the unique ultrasound propagation into the CASS piping such as beam skewing, dispersion and unexpected attenuation which gives adverse effect on the UT, characteristics of microstructure and ultrasound propagation into the CASS piping was studied using CASS specimens simulating reactor coolant piping in Japanese Pressurized Water Reactor (PWR) plants. In this study, snapshots of the wave propagation in the CASS are also successfully obtained by visualization techniques and analyzed those results theoretically.
 
Keywords
Anisotropic, Cast austenitic stainless steel, CASS, Pressurized Water Reactor, PWR, Ultrasonic testing, UT, visualization
 
Full Paper: PDF EJAM Vol.4No. 1 pp.1-21 "Study on the Ultrasound Propagation in Cast Austenitic Stainless Steel
Article Information
Article history:
Received 28 Nov 2011
Accepted 17 April 2012