Accession Number : AD0778484

Title :   Effect of Vacuum Environment on Mechanical Behavior.

Descriptive Note : Annual rept. (Final), Jan 73-Jan 74,

Corporate Author : MARTIN MARIETTA AEROSPACE DENVER COLO DENVER DIV

Personal Author(s) : Kramer,Irvin R.

Report Date : FEB 1974

Pagination or Media Count : 54

Abstract : The time to failure and the crack propagation velocity of titanium (6Al-4V) and a 4130 steel were measured as a function of applied potential and concentration of the solutions. A mechanism for stress-corrosion cracking is proposed based on the formation of a strong surface layer. It is also suggested that the films, formed as a result of interaction between the metal and the SCC medium, strongly influence the strength of the surface layer. (Author)

Descriptors :   *Titanium alloys, *Steel, *Stress corrosion, Crack propagation, Vacuum, Surfaces, Stresses, Interactions, Failure(Mechanics)

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE