Akademik Veri Yönetim Sistemi
Journal of Failure Analysis and Prevention, cilt.25, sa.2, ss.765-773, 2025 (ESCI, Scopus)
This research paper presents a comprehensive root cause failure analysis of pyrolysis furnace tubes exposed to a reducing and carburizing environment in the radiant zone. The study examines the significant thickness loss observed at the tube outlet, as well as the large pits found inside the tube, which indicate metal dusting as the primary failure mechanism. The investigation includes a thorough examination using various techniques, such as visual and stereoscopic inspection, optical emission spectrometry for composition analysis, microstructure analysis using optical and scanning electron microscopy, energy-dispersive X-ray spectroscopy, tensile testing, and hardness measurements. Analysis revealed the presence of carbides and voids along the grain boundaries, which significantly reduced the material’s integrity and led to its disintegration in the form of dusting. Mechanical properties were adversely affected, with tensile strength showing a significant reduction. This study provides valuable insights into the failure mechanism and highlights the importance of periodic inspection techniques such as corrosion residue analysis, internal boroscopy, hardness testing, replica metallography and thickness measurements to detect early signs of such damage and prevent catastrophic failures.