Accession Number:

AD0902454

Title:

SST Technology Follow-On Program, Phase I. Titanium Alloy 6Al-4V Bar and Forgings.

Descriptive Note:

Final rept. 1966-Mar 71 on Task 1,

Corporate Author:

BOEING CO SEATTLE WASH COMMERCIAL AIRPLANE GROUP

Personal Author(s):

Report Date:

1972-07-01

Pagination or Media Count:

79.0

Abstract:

A series of investigations were conducted to develop and characterize beta-processed Ti-6Al-4V bar and forgings. In addition to Ti-6Al-4V, the initial developmental studies included several other titanium alloys, Ti-8Al-1Mo-1V, Ti-6Al-6V-2Sn, and Ti-7Al-1Mo. Properties evaluated included strength, fracture toughness, stress-corrosion resistance K sub I scc fatigue, and metallurgical characteristics. The bar and forging material was found to be highly variable in properties. The variations in characteristics were associated with significant variations in chemical composition and microstructure. High fracture toughness properties were related to low oxygen contents and fully transformed beta microstructures. Properties of large forged block, 18 by 21 by 24 in., were comparable to those of conventional smaller blocks of highly forged material.

Subject Categories:

  • Transport Aircraft
  • Properties of Metals and Alloys
  • Fabrication Metallurgy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE