| 2020 №06 (02) |
DOI of Article 10.37434/tpwj2020.06.03 |
2020 №06 (04) |
The Paton Welding Journal, 2020, #6, 14-19 pages
Structural condition and fatigue damageability of welded joints of steam pipelines
V.V. Dmytryk, A.K. Tsariuk, O.S. Garashchenko and T.O. Syrenko
National Technical University «Kharkiv Polytechnic Institute» 2 Kirpichova Str., 61002, Kharkiv, Ukraine E-mail: garashchenko.helena@gmail.com
Abstract
At present time, a number of TPP power units having operated about 250000 h. in a relatively stationary operating condition, changed to a maneuver mode. This transition caused a need in studying damageability of their equipment according to the mechanism of fatigue and, in the first turn, welded joints of steam pipelines made of heat-resistant steels, operating under the conditions of creep. A further increase in fatigue damageability causes an improvement in the requirements to the initial structure of both the welded joints being produced as well as the parts to be repaired using welding. 14 Ref., 12 Figures.
Keywords: metal damageability; welded joints; fatigue cracks; structural condition; conditions of creep, dislocations
Received 11.03.2020
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