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

Personal Author(s) : Margolin,Harold ; Levine,Ernest ; Young,Morris ; Greenhut,Ira

Report Date : SEP 1973

Pagination or Media Count : 159

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)

Descriptors :   *Titanium alloys, Fracture(Mechanics), Toughness, Aging(Materials), Grain size, Hardness, Yield strength, Grain boundaries, Microstructure

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE