Accession Number:

ADA516499

Title:

COLLABORATIVE RESEARCH AND DEVELOPMENT (CR&D) Delivery Order 0043: Deformation and Texture Development During Hot Working of Titanium

Descriptive Note:

Final rept. 3 Nov 2005-31 Jan 2008

Corporate Author:

UNIVERSAL TECHNOLOGY CORP DAYTON OH

Personal Author(s):

• Salem, A. A.
• Glavicic, M. G.
• Semiatin, S. L.

Report Date:

2008-04-01

Pagination or Media Count:

60.0

Abstract:

This research in support of the Air Force Research Laboratory Materials and Manufacturing Directorate was conducted at Wright-Patterson AFB, Ohio from 3 November 2005 through 31 January 2008. This task developed constitutive models for alphabeta titanium alloys with colony-alpha microstructure and validated texture prediction models for plate rolling. A method for separating the textures of primary alpha alphasub p and secondary alpha alphasub s in alphabeta titanium alloys with a duplex microstructure was developed. Utilizing electron backscatter diffraction EBSD and energy-dispersive spectroscopy EDS, the approach relies on the non-uniform partitioning of alloying elements between primary alpha and regions containing secondary-alpha lamellae and residual beta matrix phase. The method was evaluated using samples of Ti-6Al-4V for which vanadium partitions strongly to secondary alpha beta regions. The technique thus provides a useful tool for quantifying the evolution of deformation texture in the primary alpha and transformation texture in secondary alpha formed via decomposition of the beta matrix following hot working or final heat treatment.

Descriptors:

• *MICROSTRUCTURE
• *HOT WORKING
• *TITANIUM ALLOYS
• *TEXTURE
• *DEFORMATION
• *ALUMINUM ALLOYS
• *VANADIUM ALLOYS
• OHIO
• MATHEMATICAL MODELS
• BACKSCATTERING
• ALLOYS
• REGIONS
• HEAT TREATMENT
• MATHEMATICAL PREDICTION
• EVOLUTION(GENERAL)
• TITANIUM
• ELECTRON DIFFRACTION
• DISPERSIONS
• SECONDARY
• SPECTROSCOPY
• VALIDATION
• DECOMPOSITION
• TRANSFORMATIONS
• ENERGY

Subject Categories:

• Properties of Metals and Alloys
• Fabrication Metallurgy
• Manufacturing and Industrial Engineering and Control of Production Systems
• Atomic and Molecular Physics and Spectroscopy
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE