Fretting of secondary-seal-ring candidate materials in air at temperatures to 816° C / by Robert C. Bill.

Format:

Book

Government document

Author/Creator:

Bill, Robert C., author.

Contributor:

United States. National Aeronautics and Space Administration, issuing body.

U.S. Army Air Mobility Research and Development Laboratory

Series:

NASA technical note ; D-7073.

NASA/TN ; D-7073

Language:

English

Subjects (All):

Fretting corrosion.

Chromium alloys--Testing.

Chromium alloys.

Graphite--Testing.

Graphite.

Sealing (Technology)--Materials.

Sealing (Technology).

Physical Description:

1 online resource (27 pages) : illustrations

Place of Publication:

Washington, D.C. : National Aeronautics and Space Administration, November 1972.

Summary:

Superalloys containing chromium showed decreasing fretting damage with increasing temperature of 816 C. This trend was related to the ability of the alloys to generate self-protecting oxide films. The damage at 816 C was one-third to one-tenth of that at 23 C. Osmium, chromium, and chromium carbide platings were fretted at 23 and 450 C. Osmium was extremely protective at 23 C but oxidized excessively at 450 C. Chromium and chromium carbide gave about the same protection at 450 C as the oxide films that formed on the superalloys. High graphite and low graphite carbons were fretted at 23 and 327 C. High graphite carbon was superior at 327 C, but low graphite carbon was the best material examined at 23 C.

Notes:

"November 1972."

Includes bibliographical references (page 11).

Online resource, PDF version; title from title page (NASA, viewed on June 1, 2021).

Other Format:

Online version: Bill, Robert C. Fretting of secondary-seal-ring candidate materials in air at temperatures to 816 ̊C.

OCLC:

785167730