Accession Number:

AD0857263

Title:

Tensile Properties and Fracture Toughness of 6Al-4V Titanium

Descriptive Note:

Technical rept. Apr 1968-Mar 1969

Corporate Author:

AEROJET-GENERAL CORP SACRAMENTO CA

Personal Author(s):

• Hartbower, C. E.
• Reuter, W. G.
• Crimmins, P. P.

Report Date:

1969-03-01

Pagination or Media Count:

218.0

Abstract:

Material taken from 6Al-4V titanium rocket motor cases was tested with precrack Charpy impact specimens to evaluate the following as factors affecting plane-stress crack toughness andor chamber performance 1 anisotropy and inhomogeneity, 2 forging practice die, ring-roll and extrusion, 3 interstitial-element chemistry, and 4 test temperature. The material was obtained from 14 hydroburst Minuteman chambers, nine of which were premature-proof-test failures, four were successfully hydroburst chambers, and one failed after 11 proof-test cycles. Material sampling included the immediate vicinity of fracture origins in an attempt to correlate fracture toughness and chamber performance.

Descriptors:

• *TITANIUM ALLOYS
• *ROCKET ENGINE CASES
• IMPACT TESTS
• TENSILE PROPERTIES
• VANADIUM ALLOYS
• FRACTURE(MECHANICS)
• COMBUSTION CHAMBERS
• STRUCTURAL PROPERTIES
• ALUMINUM ALLOYS
• TOUGHNESS

Subject Categories:

• Metallurgy and Metallography
• Rockets
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE