Accession Number : AD0475595

Title :   STUDY OF VACUUM WELDING.

Descriptive Note : Interim rept. 2 Mar 64-15 Jun 65,

Corporate Author : NATIONAL RESEARCH CORP CAMBRIDGE MA NORTON EXPLORATORY RESEARCH DIV

Personal Author(s) : Brock, F. J. ; Fasolino, L. G. ; Hordon, M. J.

Report Date : AUG 1965

Pagination or Media Count : 73

Abstract : Cold welding between aluminum, copper, stainless steel (440 C and 17-4 PH), and tungsten carbide was studied experimentally over the temperature range of 90 to 260 C with interface contact stresses at 0,100 and 1000 psi under extremely low pressures about 5 x 10 to the minus 13th power torr. Adhesion after abrasion was studied under the same conditions. Vacuum effects were separated from temperature effects by conducting the tests both in vacuum and unit temperature effects by conducting the tests both in vacuum and unit atmosphere of argon. The effectiveness of anti-adhesion coatings (aluminum oxide, chromium oxide, zirconium oxide and molybdenum disulfide) was studied under the same conditions. A review of existing cold welding theories was made and a set of design criteria developed to aid in preventing welding. (Author)

Descriptors :   *WELDING, VACUUM, ALUMINUM ALLOYS, COPPER, STAINLESS STEEL, CARBIDES, TUNGSTEN ALLOYS, ABRASIVES, ARGON, CONTROLLED ATMOSPHERES, ADHESION, REDUCTION, SPACE ENVIRONMENTS, COATINGS, OXIDES, CHROMIUM COMPOUNDS, ALUMINUM COMPOUNDS, DIOXIDES, ZIRCONIUM COMPOUNDS, SULFIDES, MOLYBDENUM COMPOUNDS, TEMPERATURE, SHEAR STRESSES, SEPARATION, BONDING, FRICTION, SURFACES.

Subject Categories : Metallurgy and Metallography
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE