Accession Number : AD0874592

Title :   Study Influence of Solid Films and Surface Layer on the Creep Behavior of Titanium.

Descriptive Note : Final rept. 15 Sep 69-15 Sep 70,

Corporate Author : MARTIN MARIETTA AEROSPACE DENVER CO

Personal Author(s) : Kramer, I. R. ; Kumar, A.

Report Date : SEP 1970

Pagination or Media Count : 54

Abstract : The effect of prestressing and surface removal (SSR) on the creep behavior of titanium (6Al-4V) alloy was investigated. It was observed that PSR treatment reduces the transient as well as steady state creep rate of titanium (6Al-4V) alloy. The best results were obtained by stressing the specimens to 100 ksi at room temperature. The improvement in the creep rate was observed at 550, 600, and 650F. At stresses approximately equal to the proportional limit at the test temperature, the creep rate obtained by SSR treatment is about the same as that of untreated specimens. However, as the test stress is decreased the difference between the creep rates increases rapidly. (Author)

Descriptors :   *TITANIUM ALLOYS, CREEP, STRESSES, FILMS, SURFACE PROPERTIES, ALUMINUM ALLOYS, VANADIUM ALLOYS.

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE