Friction and Wear of Nickel-Aluminum Alloys and Some Sulfur-Modified Steels in Vacuum to 10-9 Millimeter of Mercury
Abstract
The friction, wear, and welding characteristics of 52100, 440-C stainless steel, and M-2 tool steel with and without the addition of 0.4 to 0.5 percent sulfur were studied in vacuum (l0-9 mm Hg). Studies were also conducted with simple nickel-aluminum binary alloys in vacuum. Friction and wear studies were made with a hemispherical (3/l8-in.-rad.) rider, which slides in a circular path on the flat surface of a rotating metal disk of the same metal. The specimens in vacuum had a load of 1000 grams (2.2 lb), a sliding velocity of 75 to 1980 feet per minute, and a temperature of 750 F The addition of 0.4 to 0.5 percent sulfur to 52100, 440-C, and M-2 reduced friction, wear, and welding normally encountered with these alloys in vacuum. With nickel-aluminum binary alloys friction and wear improved with the addition of aluminum to nickel. A 18.4-percent-aluminum - nickel alloy exhibited lower friction and less wear and metal transfer in vacuum than did two commercial nickel-base alloys. %
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1964
- Accession Number
- ADA394398
Entities
People
- Donald H. Buckley
- Robert L. Johnson
Organizations
- National Aeronautics and Space Administration