Back to Search
Start Over
In situ X-ray imaging of melt pool dynamics in underwater arc welding
- Source :
- Materials & Design, Vol 179, Iss, Pp-(2019)
- Publication Year :
- 2019
- Publisher :
- Elsevier, 2019.
-
Abstract
- The dynamic behavior of the underwater melt pool was firstly in-situ observed with the X-ray transmission method. A method for quantitatively characterizing the melt pool stability was pioneered. Comparing with conventional melt pool composing metal liquid, the pool was filled with bubbles in underwater environment. By observing the X-ray images and charactering the weld pool waveform, it is confirmed that the underwater melt pool was more volatile than onshore melt pool, which was mainly caused by the evolution of large bubble in the pool. Violent fluctuation of melt pool was the basic reason gaining poor weld and multiple defects in the underwater wet welding. To mitigate pool fluctuations by reducing the size of bubble, the ultrasonic vibration was applied directly on the workpiece, which improved the melt pool stability, uniformized the weld formation, and decreased the weld porosity. Keywords: In situ X-ray imaging, Underwater wet welding, Melt pool dynamics, Bubble evolution, Ultrasonic vibration
- Subjects :
- Materials science
Mechanical Engineering
Bubble
02 engineering and technology
Welding
Mechanics
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
law.invention
Mechanics of Materials
law
Weld pool
lcsh:TA401-492
Waveform
General Materials Science
lcsh:Materials of engineering and construction. Mechanics of materials
Arc welding
Underwater
0210 nano-technology
Porosity
Melt pool
Subjects
Details
- Language :
- English
- ISSN :
- 02641275
- Volume :
- 179
- Database :
- OpenAIRE
- Journal :
- Materials & Design
- Accession number :
- edsair.doi.dedup.....3ede641ae420204dc50a14b0d16fdc40