Accession Number:

ADA394398

Title:

Friction and Wear of Nickel-Aluminum Alloys and Some Sulfur-Modified Steels in Vacuum to 10-9 Millimeter of Mercury

Descriptive Note:

Corporate Author:

NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CENTER

Report Date:

1964-05-01

Pagination or Media Count:

21.0

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 3l8-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.

Subject Categories:

  • Organic Chemistry
  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE