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Moh. Ali Sidik
Universitas Dian Nusantara
Computer Science & IT Electrical & Electronics Engineering Mechanical Engineering

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Analisis Mekanisme Kegagalan Guide Vane dan Bottom Ring Akibat Erosi Sedimen pada Turbin Hidro Moh. Ali Sidik; Komarudin Komarudin
Infotekmesin Vol 17 No 2 (2026): Infotekmesin: Juli 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/

Abstract

Sediment erosion is one of the primary causes of damage to the guide vane and bottom ring components of hydro turbines, resulting in reduced operational reliability and increased maintenance costs. Previous studies have mainly focused on coating materials, numerical simulations, or microstructural characterization separately, while the failure mechanism based on actual field damage has not been comprehensively explained. This study aims to investigate the failure mechanism of guide vane and bottom ring components subjected to sediment erosion using a forensic engineering approach. The investigation involved visual inspection, in-situ hardness testing, Micro Vickers hardness testing, and microstructural analysis using Scanning Electron Microscopy (SEM). The results revealed that the failure process initiated with the formation of microcracks in the protective coating, followed by coating adhesion degradation and coating spalling. Consequently, the exposed substrate experienced direct impacts from sediment particles, leading to crack propagation and progressive material loss. These findings provide a comprehensive understanding of the sediment erosion failure mechanism and can serve as a reference for improving inspection strategies, maintenance practices, and the durability of protective coatings in hydro turbines
Co-Authors Komarudin Komarudin