Email this article Examples of corrosion cracking in Cr18Ni10Ti steel caused by residual stresses at bends and pittings
- Authors: Barakhtin B.K.1, Malyshev V.N.1
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Affiliations:
- Central Research Institute of Structural Materials Prometey
- Issue: Vol 7, No 6 (2016)
- Pages: 904-908
- Section: Corrosion and Protection of Metals
- URL: https://journals.rcsi.science/2075-1133/article/view/205873
- DOI: https://doi.org/10.1134/S2075113316060022
- ID: 205873
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Abstract
The paper considers test results for corrosion cracking in unfixed U-shaped samples of steels Cr18Ni10 and Cr18Ni8 in a 1 N HCl solution at a room temperature and in a saturated NH4Cl solution at 100°C. It is found that, in such samples, corrosion cracks occur on both the convex and the concave side. This fact contradicts theoretical concepts according to which residual stresses of opposite signs have to occur in the surface layers on opposite sides of the samples after the bending and subsequent elastic unloading. Examples are presented for the formation of CC microcracks near the growing pittings in smooth flat samples made of steel Cr18Ni10Ti in the absence of external stresses.
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About the authors
B. K. Barakhtin
Central Research Institute of Structural Materials Prometey
Author for correspondence.
Email: BBarakhtin@mail.ru
Russian Federation, St. Petersburg, 191015
V. N. Malyshev
Central Research Institute of Structural Materials Prometey
Email: BBarakhtin@mail.ru
Russian Federation, St. Petersburg, 191015
