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STUDY OF VACUUM WELDING.
NATIONAL RESEARCH CORP CAMBRIDGE MA NORTON EXPLORATORY RESEARCH DIV
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
Interim rept. 2 Mar 64-15 Jun 65,