Accession Number:

AD0775716

Title:

Fracture Toughness, Aging Behavior, Grain Growth, and Hardness of Alpha-Beta Titanium Alloys.

Descriptive Note:

Technical rept. 1 Mar 72-30 Apr 73,

Corporate Author:

POLYTECHNIC INC OF BROOKLYN N Y DEPT OF PHYSICAL AND ENGINEERING METALLURGY

Report Date:

1973-09-01

Pagination or Media Count:

159.0

Abstract:

The fracture toughness of Ti-5.25Al-5.5V-0.9Fe-0.5Cu was studied for equiaxed alpha-aged beta structures heat treated to produce 0.2 yield stresses of 180,000 psi. The structure of Ti-6Al-2Sn-4Zr-6Mo was determined over a range of quenching and aging temperatures by x-ray and electron microscopy. Hardness was corrected with structure as a function of aging time. Methods of revealing grain size in a two-phase alpha-beta titanium alloy have been examined and observations on beta grain growth in the presence of alpha have been carried out. The hardness of grain boundary alpha was studied as a function of the thickness of alpha and the hardness of the beta matrix in a Ti-5.25Al-5.5V-0.9Fe-0.5 Cu alloy. Modified author abstract

Subject Categories:

  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE