Journal
MATERIALS & DESIGN
Volume 88, Issue -, Pages 990-998Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2015.09.123
Keywords
Underwater welding; Friction taper plug welding; Material flow; Mechanical properties; Pipeline steel
Categories
Funding
- National Natural Science Foundation of China [51475327]
Ask authors/readers for more resources
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 degrees as the best. (C) 2015 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available