R. Maksuti, H. Mehmeti, N. Cerkini, M. Rama, Faculty of Mining and metallurgy, University of Prishtina, Kosova, Mitrovica, Macedonia
The integrity and the performance of the welded joint of pipelines depend on the microstructure and associated properties.
The welded joint of steel pipes produced by two-pass double sided submerged arc welding (SAW) consisted of the weld metal (WM), heat affected zone (HAZ) and base metal(BM) and as result the welded joint is characterised by a wide range of different microstructures.
These diffrent microstructures of the welded joint cause substantial differences on the impact toughness behaviour of the welded joint.
The object of this work was to investigate the influence of the microstructure on the impact toughness properties using Charpy V-notch (CVN) testing.
The obtained results using LOM(Light Optical Microscopy), SEM (Scanning Electron Microscoy) with EPMA (Electron Probe Micro Analysis)are presented in this study and this is an attempt to contribute on the correlation between microstructure and impact toughness properties of two pass double sided submerged arc welded joint of pipeline steel API 5L grade X65.
Summary: The integrity and the performance of the welded joint of pipelines depend on the microstructure and associated properties.
The welded joint of steel pipes produced by two-pass double sided submerged arc welding (SAW) consisted of the weld metal (WM), heat affected zone (HAZ) and base metal(BM) and as result the welded joint is characterised by a wide range of different microstructures.
These diffrent microstructures of the welded joint cause substantial differences on the impact toughness behaviour of the welded joint.
The object of this work was to investigate the influence of the microstructure on the impact toughness properties using Charpy V-notch (CVN) testing.
The obtained results using LOM(Light Optical Microscopy), SEM (Scanning Electron Microscoy) with EPMA (Electron Probe Micro Analysis)are presented in this study and this is an attempt to contribute on the correlation between microstructure and impact toughness properties of two pass double sided submerged arc welded joint of pipeline steel API 5L grade X65.
