FUNDAMENTAL STUDY OF UNDERWATER ARC STUD WELDING

This study is a part of the current research program on underwater welding being carried out at the Massachusetts Institute of Technology and sponsored by the National Sea Grant Office. A method for the underwater welding of a large diameter stud is designed and the resulting weldment is tested and evaluated. With the use of steel wool as an arc initiator the conventional arc stud welding system can be adapted to underwater use. Studs welded in air are used as a basis for comparison in determining acceptable weld-quality standards. Tensile and bend tests, macroscopic and microscopic examinations, and microhardness surveys are conducted in evaluating the stud welding system, and general conclusions are drawn about the metallurgical compatibility and the mechanical soundness of the welds. By far the most important conclusion coming out of this study is that the arc stud welding process can be applied successfully underwater without employing complex back-up devices for water evacuation and/or gas shielding.

• Corporate Authors:

  Massachusetts Institute of Technology

  Department of Naval Architecture and Marine Engineering
  Cambridge, MA  United States  02139
• Authors:
  • Chiba, J
• Publication Date: 1977-5-12

Subject/Index Terms

• TRT Terms: Electric arc welding; Studs; Welding
• Old TRIS Terms: Stud welding; Underwater welding; Welding techniques
• Subject Areas: Construction; Marine Transportation;

Filing Info

• Accession Number: 00168241
• Record Type: Publication
• Source Agency: Massachusetts Institute of Technology
• Report/Paper Numbers: MS Thesis
• Files: TRIS
• Created Date: Jan 30 1978 12:00AM