Accession Number:

AD0269679

Title:

RESEARCH AND DEVELOPMENT OF TITANIUM ROCKET MOTOR CASE

Descriptive Note:

Corporate Author:

PRD ELECTRONICS INC BROOKLYN N Y

Personal Author(s):

Report Date:

1961-10-31

Pagination or Media Count:

1.0

Abstract:

The sustained notched tensile strength of coldrolled and aged sheet stock at the 180,000 psi yield strength level was lower in the -35 F to 200 F temperature range for a H content of 70 than for 200 ppm strengths were equivalent at 400 F. Press-forged pancakes with a 0.15-O content were capable of attaining the 200,000 psi yield strength level by direct aging at 900 F. Multiple-pass tungsten inert gas TIG welding produced no improvement in notched tensile strength or toughness as compared with the single-pass method despite reduced grain size and increased bend ductility electron-beam welding yielded slight improvements as compared with TIG welding. Closed-die press forging of subscale 14-in.-diam domes by the pancake and preform technique at 1650 F and 1700 F produces superior tensile ductility at the 180,000 psi yield strength level as compared with similar forging at 1850 and 2000 F. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE