ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The membrane, which forms the primary barrier of the cargo tank onboard LNG carrier,is made of corrugated sheets, angle pieces and sealing caps and so on. These components aremanufactured from SUS 304L sheets of 1.2mm thickness and assembled by the plasma welding.There are several welding defects such as overlap, excessive convexity, excessive concavity of weldand incomplete inclusion in the plasma welding. These unacceptable portions of the weld should beremoved and repaired in order to prevent propagation of the defects. So a study is undertaken todetermine the optimum process parameters such as the welding current, traveling speed, gas flowrates and frequency in the plasma lap welding process for LNG ships in order to prevent thesedefects. The polished and etched surface of the welded membrane sheet is examined if the crosssection shows a properly made weld. And the tensile tests are conducted to consider if the tensilestrength is less than the minimum required for the parent metal of the membrane sheet
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.26-28.507.pdf
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