Effect of water depth on the underwater wet welding of ferritic steels using austenitic Ni-based alloy electrodes
Sheakley, Brian J.
MetadataShow full item record
Underwater welding using shielded metal arc welding (SMAW) on US naval Vessels is very attractive because of the ability to effect repairs without costly dry dock expenses. In the past the primary problems with underwater wet weldments on steels utilizing SMAW with ferritic electrodes, were underbead cracking in the heat affected zone (HAZ), slag inclusions, oxide inclusions, and porosity. To avoid underbead cracking three weld samples were made using an austenitic nickel weld metal with an Oxylance coating at 10 feet of salt water, 25 feet of salt water, and 33 feet of salt water. A final sample was made using austenitic nickel weld metal with a Broco coating at 33 feet of salt water. Because of the ductility of the austenitic nickel weld metal no underbead cracking occurred, however porosity and high inclusion counts were found in all four samples. The average size of the inclusion increased with increasing depth. The Broco sample exhibited far greater porosity than did the 0xylance samples. This work addresses quality of the welds, mechanisms for the formation of the inclusions, and analysis of the difference between the Oxylance and Broco weld rods
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
Showing items related by title, author, creator and subject.
Corrosion and thermal processing in cold gas dynamic spray deposited austenitic stainless steel coatings Luhn, John A. (Monterey, California: Naval Postgraduate School, 2016-06);This thesis presents research on the corrosion properties and effects of heat treatment on austenitic stainless steel coatings produced by the cold gas dynamic spray process on 316L stainless steel substrates. Previous ...
Manning, Ryan Daniel (Monterey, California. Naval Postgraduate School, 1998-09);The use of underwater weldments on U.S. Naval Vessels is highly desirable due to the ability of performing repairs without costly dry dock expenses. The primary problem with underwater wet weldments is underbead cracking ...
Johnson, Robert L (Monterey, California. Naval Postgraduate School, 1997-09);Specifications for Underwater Welding have not yet addressed the effect of water temperature on weldment microstructure. The environmental effects on Underwater Wet Welding using a shielded metal arc welding (SMAW) process ...