Accession Number : AD0691798

Title :   TENSILE PROPERTIES OF Ti 7Al-4Mo HEAVY-SECTION FORGINGS,

Corporate Author : BOEING CO PHILADELPHIA PA VERTOL DIV

Personal Author(s) : Raefsky,M.

Report Date : 30 JAN 1969

Pagination or Media Count : 28

Abstract : In general, beta forging Ti 7Al-4Mo results in lower tensile properties, especially reduction in area. The best combination of annealed properties occurs on mill annealing followed by a single high (1700F) temperature anneal. The best combination of solution treated properties results from low temperature forging, followed by quenching from 1720F. Yield strength can be increased by quenching from higher temperatures. Over aging at 1250F results in a decrease in tensile and yield strengths, with a corresponding increase in ductility. Solution heat treat temperatures for alpha/beta forged material should not exceed 1720F. Ti 7Al-Mo, in general, is capable of higher solution treated and aged strengths than Ti 6Al-4V. (Author)

Descriptors :   (*TITANIUM ALLOYS, TENSILE PROPERTIES), (*FORGING, TITANIUM ALLOYS), ALUMINUM ALLOYS, MOLYBDENUM ALLOYS, HEAT TREATMENT, AGING(MATERIALS)

Subject Categories : Metallurgy and Metallography
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE