Accession Number:

ADA019046

Title:

A. Fatigue Failure in Annealed Ti-6Al-4V Microstructures. b. Fatigue Life in Annealed and Martensitic Ti-6Al-4V

Descriptive Note:

Technical rept.

Corporate Author:

GEORGE WASHINGTON UNIV WASHINGTON DC INST FOR THE STUDY OF FATIGUE FRACTURE AND STRUCTURAL RELIABILITY

Personal Author(s):

Report Date:

1975-08-01

Pagination or Media Count:

48.0

Abstract:

In part 2 of the report, the Fatigue crack initiation lives are determined for three annealed microstructures of Ti-6Al-4V alpha-beta annealed, recrystallized anneal and beta anneal. The tests were conducted using fully reversed cyclic torsional strain amplitudes of plus or minus 0.006 and plus or minus 0.012. At both strain amplitudes the alpha-beta annealed alloy had the longest fatigue life and the beta annealed alloy had the shortest fatigue life. In part b, the fatigue life of annealed and quenched microstructures of the alloy Ti-6Al-4V were determined using a fully reversed cyclic torsional strain of 0.02. The quenched microstructures all had a longer fatigue life than the annealed microstructures, but a solution treatment of 1650F followed by a water quench resulted in an alloy with a fatigue life four times longer than any of the other solution treatments and about ten times longer than the annealed specimens.

Subject Categories:

  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE