Abstract
Low-cyclic fatigue test results are presented for samples cut in the axial and tangential direction from bimetallic tubing (base metal-steel 10GN2MFA + steel cladding 05Kh19N10G2B). The steel cladding material tends to contain multiple hot cracks of sizes up to 2 mm in the radial, and up to 5 mm in the axial direction. It was shown that a cyclic load Rσ≈O at maximum stress levels σmax = 350–400 MPa either did not lead to a change in the initial tears, or caused an increase in their size which did not exceed 0.3–0.7 mm.
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References
E. G. Starchenko, A. E. Runov, A. V. Zalinov, et al., “Materials and technology used in anticorrosion cladding of equipment for the AE industry,” Énergomashinostroenie, No. 3, 8–12 (1984).
A. A. Popov, A. G. Mazepa, and Yu. M. Nikitin, “The resistance of weld joints containing defects to low-cycle fatigue,” in: The Mechanical Fatigue of Metals: Materials VI International Conference, Kiev, Naukova Dumka (1983), pp. 409–415.
Strength Design Standards for Equipment and Tubing used in Atomic Energy Plants (PNAE G-7-002-86) [in Russian], Énergoatomizdat, Moscow (1989).
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Translated from Problemy Prochnosti, No. 4, pp. 13–19, April, 1993.
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Mazepa, A.G., Runov, A.E. Cyclic crack resistance of bimetallic tubing with surface tears in the clad layer. Strength Mater 25, 243–248 (1993). https://doi.org/10.1007/BF00776946
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DOI: https://doi.org/10.1007/BF00776946