Assessment of metal hydrogenation effect on life time of heat-exchange pipes of steam generators

Keywords

hydrogenation of metal, creep, deformation energy, damage, durability, hydrogen-containing medium.

Cite as

Hembara O. V., Chepil O. Ya., Hembara N. T., and Syrotyuk A. M. Assessment of metal hydrogenation effect on life time of heat-exchange pipes of steam generators. Physico­chemical Mechanics of Materials. 2022. 58(2), 044-048.

Abstract

The stress-strain state of bending of heat-exchange tubes of steam generators made of stainless heat-resistant chromium-nickel 08Kh18N10Т steel is analyzed numerically under simulating operating conditions, taking into account the saturation of the tube metal with hydrogen. It has been established that the preliminary deformation of the metal in the heat exchange tube bend reduces the pipe durability by 19% compared to the straight section; when exposed to a hydrogen-containing medium, under the influence of hydrogen-con­taining environment the durability in the pipe bend decreases by an additional 12%.

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