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Russian Metallurgy (Metally)

, Volume 2019, Issue 10, pp 1112–1124 | Cite as

Creep of Tubes under External Pressure

  • E. E. Vorob’evEmail author
  • M. M. Peregud
  • T. N. Khokhunova
  • O. Yu. Mileshkina
  • S. A. Bekrenev
  • V. A. Markelov
  • M. A. Shtremel’
APPLIED PROBLEMS OF STRENGTH AND PLASTICITY
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Abstract

29 tubes made of an E110 alloy for VVER and PWR reactors are subjected to creep tests under external pressure (temperature of 350 and 380°C, circumferential stress of 70–130 MPa, holding time up to 4250 h). Creep is found to be accelerated after deformation up to 0.9% and ovality up to b/a = 0.86 and is ended in the collapse of a tube. The equations of tube equilibrium and creep under pressure are generalized for tubes of any ovality (ellipses of any eccentricity). The solutions to these equations predict the presence of a general curve in the contour length–eccentricity coordinates and give tube instability conditions under pressure.

Keywords:

creep in tubes E110 alloy external pressure 

Notes

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Copyright information

© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  • E. E. Vorob’ev
    • 1
    • 2
    Email author
  • M. M. Peregud
    • 1
  • T. N. Khokhunova
    • 1
  • O. Yu. Mileshkina
    • 1
  • S. A. Bekrenev
    • 1
  • V. A. Markelov
    • 1
  • M. A. Shtremel’
    • 2
  1. 1.AO VNIINMMoscowRussia
  2. 2.National University of Science and Technology MISiSMoscowRussia

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