Accession Number : ADA953956

Title :   Investigation of the Welding of High-Strength Aluminum Alloys.

Descriptive Note : Summary rept.,


Personal Author(s) : Jacobson,M. I. ; Martin,D. C. ; Voldrich,C. B.

Report Date : 01 MAR 1952

Pagination or Media Count : 28

Abstract : The objective of the investigation was to determine the feasibility of producing high-strength welded joints in thick plates of high-strength aluminum. The solution of the problem involves two places where weaknesses occur: the weld itself, and the heat-affected zone in the base plate. Thus, a high-strength weld metal is required, and the weakness of the heat-affected zone must be overcome either by reducing the heat effect of welding, or by postweld heat treatment. The ultimate aim of the investigation was to develop means of making welded joints having joint efficiencies of 80 per cent or better and adequate ductility. In the past five years, good progress has been made in overcoming both of the problems mentioned above. During this investigation, filler-metal alloys have been found which produce weldments in 24S and 75S plates having joint efficiencies of 50 to 60 per cent rather than the 30 per cent obtainable with the filler metals in use five years ago. This means that the design stresses for aluminum weldments of thick sections can be doubled if these filler metals are used. It has been found that, when it can be used, heat treatments of welded joints in high-strength aluminum alloys will produce very high strengths.

Descriptors :   *Aluminum alloys, *Welding, *Welded joints, Weldments, Heat treatment, Weld metal, Ductility, High strength alloys, Thickness

Subject Categories : Metallurgy and Metallography
      Fabrication Metallurgy
      Couplers, Fasteners, and Joints

Distribution Statement : APPROVED FOR PUBLIC RELEASE