The evaluation of suitability for operation of repair low-alloy steel welded joints
Journal Title: Archives of Materials Science and Engineering - Year 2016, Vol 78, Issue 2
Abstract
Purpose: The purpose of the work was to evaluate the material condition of repair weldedjoints of steam pipelines with regard to their suitability for operation including determinationof the time of their further safe operation.Design/methodology/approach: The following was carried out: microstructureinvestigations using scanning electron microscopy, investigations on mechanical propertiesat room and elevated temperatures, determination of the fracture appearance transitiontemperature based on impact tests. The abridged creep tests without measurement ofelongation during test were carried out to determine the material’s residual life.Findings: The time of safe operation was determined for welded joints made in 14MoV63steel after long-term service and 14MoV63 steel after long-term service and in theas-received condition.Practical implications: The applied methodology and the adopted procedures are usedin evaluating the condition and forecasting further operation of new repair welded joints forthe pressure part components of power equipment working under creep conditions.Originality/value: The obtained results of investigations will be the elements of materialscharacteristics worked out by the Institute for Ferrous Metallurgy for the steels and weldedjoints made in them to work under creep conditions.
Authors and Affiliations
M. Dziuba-Kałuża, A. Zieliński, J. Dobrzański, T. Linek
Keywords
Related Articles
- EP ID EP189879
- DOI 10.5604/18972764.1226992
- Views 64
- Downloads 0
Chasing shadows: technology and socioeconomic barriers versus climate targets for iron and steel industry
Purpose: To analyse the potential of various scenarios for reduction of carbon footprint of iron and steel sector and to reveal plausible pathways for modernisation. Design/methodology/approach: Several scenarios hav...
A study on welding quality for the automatic vertical-position welding process based on Mahalanobis Distance method
Purpose: The welding quality and reducing production cost could be achieved by developing the automatic on-line welding quality monitoring system. However, investigation of welding fault to quantify the...
Cover
Cover
Life cycle assessment of technical systems taking into consideration degradation processes in materials of constructions
Purpose: In the engineering analysis and transport forensic examination, there are often arise problems in establishing the causes and mechanism for the destruction of structural elements. At the moment, s...
PVD surface treatment of heat-treated cast aluminium alloys
Purpose: Main purpose of the paper is results share of AlSi9Cu and AlSi9Cu4 castaluminium alloys treatment investigation. Processing was performed using CAE-PVDmethod in order to obtain gradient coatings.Design/methodolo...