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Material flow influence on the weld formation and mechanical performance in underwater friction taper plug welds for pipeline steel
- Source :
- Materials & Design, Vol 88, Iss, Pp 990-998 (2015)
- Publication Year :
- 2015
- Publisher :
- Elsevier BV, 2015.
-
Abstract
- Friction taper plug welding experiment was conducted on X65 pipeline steel in underwater wet condition. Results indicate that the weld defects, microstructural evolution and mechanical properties are closely related to the material flow behavior during welding. The formation of weld defect characterized by incomplete filling or lack of bonding is mainly caused by the poor flowing property of the plug material especially in low axial welding force. In the experiment condition, rising the axial force would result in better material flow, higher weld power, more energy input and further improve the bond quality of the weld. Microstructure of both weld zone and heat-affected-zone mainly consists of lath bainite which results in an overmatching condition through the weld. High quality welds in this study also exhibit good tensile and impact properties that is equal to the base metal and acceptable bend property of 105° as the best. Keywords: Underwater welding, Friction taper plug welding, Material flow, Mechanical properties, Pipeline steel
- Subjects :
- Heat-affected zone
Weld access hole
Materials science
Mechanical Engineering
Metallurgy
Welding
Microstructure
Electric resistance welding
Material flow
law.invention
Mechanics of Materials
law
Ultimate tensile strength
lcsh:TA401-492
lcsh:Materials of engineering and construction. Mechanics of materials
General Materials Science
Friction welding
Composite material
Subjects
Details
- ISSN :
- 02641275
- Volume :
- 88
- Database :
- OpenAIRE
- Journal :
- Materials & Design
- Accession number :
- edsair.doi.dedup.....01db3c0b64a60d371c92fa3c1b1a1308