Effect of Vacuum Environment on Mechanical Behavior.
Annual rept. Jan 71-Jan 73,
MARTIN MARIETTA AEROSPACE DENVER COLO DENVER DIV
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The surface layer stress of titanium alloy 6Al4V and 5Al2.5Sn was measured in methanol-chloride solutions as a function of voltage. The surface layer stress was found to increase markedly as the specimen became more anodic. It is proposed that stress-corrosion cracking is associated with the formation of a surface layer of critical strength to support a pileup of dislocations to cause fracture. The stress corrosion behavior of titanium and aluminum 2014-T6 was determined on specimens with and without the surface layer. A marked increase in the stress corrosion cracking resistance was achieved by eliminating the surface layer. Author
- Properties of Metals and Alloys