Fracture toughness and aging behavior of alpha--beta titanium alloys. Final technical report, 1 May 1973--15 Mar 1975. [Ti--5. 25Al--5. 5V--0. 9Fe--0. 5Cu; Ti--6Al--2Sn--4Zr--6Mo]

Technical Report · Mon Sep 01 04:00:00 EDT 1975

OSTI ID:7142934

Margolin, H; Levine, E; Young, M; Mahajan, Y

Fracture toughness K/sub Q/, was studied as a function of microstructure for alloy No. 2, Ti--5.25Al--5.5V--0.9Fe--0.5Cu, at a y.s. of 180 Ksi (1241 MN/sq m, and for Ti--6Al--2Sn--4Zr--6Mo at y.s. of 160 Ksi (1100MN/sq m), with emphasis on alloy no. 2. For equiaxed alpha structures K/sub Q/ initially decreased with increasing grain size (G.S.) and subsequently increased. Analysis of Widmanstatten plus grain boundary alpha data separated out the G.S. contribution which was attributed to increased plasticity when the G.S. became significantly large with respect to calculated plastic zone sizes. Attempts were made to calculate individual contributions of matrix and alpha to K/sub Q/. Experiments were conducted to correlate microstructure and mechanical properties for Ti-6-2-4-6. (GRA)

• Research Organization: Polytechnic Inst. of Brooklyn, N.Y. (USA)
• OSTI ID: 7142934
• Report Number(s): AD-A-019518
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
COPPER ADDITIONS
COPPER ALLOYS
CORRELATIONS
CRYSTAL STRUCTURE
FRACTURE PROPERTIES
IRON ADDITIONS
IRON ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
MOLYBDENUM ALLOYS
TIN ALLOYS
TITANIUM ALLOYS
TITANIUM BASE ALLOYS
VANADIUM ALLOYS
ZIRCONIUM ALLOYS