Author:
Barat V. A.,Marchenkov A. Yu.,Karpova M. V.,Bardakov V. V.,Ushanov S. V.
Abstract
The paper investigates the possibility of detecting specific structural defects of dissimilar welded joints by the method of acoustic emission (AE). Carbide and decarburized interlayers are formed in dissimilar welded joints of austenitic and pearlitic steels during welding and subsequent operation. Diffusion interlayers, as a structural defect, are usually small in size and cannot be detected by traditional non-destructive testing (NDT) methods, while the AE method is promising for detecting such defects. In the present work, we studied the AE data obtained during testing of defect-free specimens of a welded joint and specimens with diffusion interlayers. It has been established that the AE parameters for defective and defect-free welded joints have significant differences, which makes it possible to identify the presence of diffusion interlayers in dissimilar welded joints.
Publisher
Izdatel'skii dom Spektr, LLC
Subject
General Medicine,General Chemistry
Reference18 articles.
1. Khodakov V. D., Khodakov D. V. (2016). Structure and mechanism of formation of dissimilar welded joints in nuclear power plant made of austenitic and pearlitic steels. Welding International, 30(12), 935 – 940.
2. Goncharov A. L., Marchenkov A. Yu., Terentyev E. V. et al. (2019). Study of structural non-homogeneity impact on mechanical properties of dissimilar weld joints of carbon steel 20 and corrosion-resistant austenitic 12Kh18N10T steel. IOP Conference Series: Materials Science and Engineering, 681, 012016.
3. Federal norms and rules in the field of atomic energy use “Rules for the design and operation of localizing safety systems of nuclear power plants”. (2016). Federal norms and rules No. NP-010-16. Moscow: FBU «NTTs YaRB». [in Russian language]
4. Instructions for visual and measuring control, 39(3). (2004). Guidance document No. RD-03-606-03. Moscow: NTTs po bezopasnosti v promyshlennosti Gosgortekhnadzora Rossii. [in Russian language]
5. Non-destructive testing. Welded connections. Radiographic method. (2008). Ru Standard No. GOST 7512–82. Moscow: Standartinform. [in Russian language]