Accession Number:

AD0662604

Title:

STRESS AND CHEMICAL CORROSION OF TITANIUM ALLOY IN FREON ENVIRONMENTS,

Descriptive Note:

Corporate Author:

AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Report Date:

1967-10-01

Pagination or Media Count:

42.0

Abstract:

The stress corrosion cracking tendency of Ti-6Al-4V alloy was investigated in environments of commercial Freon TF with and without 0.3 ppm Cl2 gas. Both welded and nonwelded titanium alloy specimens were stressed to 80 percent of the yield strength 0.2 percent offset for 72-hr exposures to the Freon TF environment. Mechanical property measurements and metallographic analysis were performed on the titanium alloy specimens before and after exposure. There was no evidence that Freon TF, with or without 0.3 ppm Cl2, would cause stress corrosion cracking of Ti-6Al-4V alloy. Exposure of the stressed titanium to Freon TF for 72 hr resulted in a slight increase in tensile strength. This increase is believed to be due to a creep hardening phenomenon rather than any reaction between the titanium and the Freon TF. Author

Subject Categories:

  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE