Damage analysis and restoring of structural integrity of Pelton runner after repair welding: case study
Year: 2024
Type: article
Abstract: This paper presents the repair welding technology of a Pelton runner blade, including an analysis of damage caused by cavitation. Extreme exploitation conditions resulted in crack initiation followed by its propagation, with a length 200 mm, detected during regular annual maintenance, compromising Peltron turbine’s structural integrity. The base material of the Pelton turbine was steel X3CrNiMo13-4, and as well as the blade geometry itself, required special attention during the process of defining repair welding technology. An austenitic electrode was used for this purpose along with a welding technology defined in a way to counter the initiation of new cracks at the same location. Following the NDT, the Pelton runner was put back into exploitation, along with recommendations for its further monitoring.
Source: Integritet i vek konstrukcija
Authors: Milan Miladinov, Branislav Đorđević, Simon Sedmak, Ciprian Bratu, Dorin Radu, Aleksandar Sedmak, Nikola Aleksić
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4404107762