Fiber damage during the consolidation of PVD Ti-6Al-4V coated NEXTEL 610{trademark} alumina fibers

Journal Article · Sun Oct 01 04:00:00 EDT 1995 · Acta Metallurgica et Materialia

DOI:https://doi.org/10.1016/0956-7151(95)90145-0· OSTI ID:116112

Warren, J; Elzey, D M; Wadley, H N.G. ^[1]

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1. Univ. of Virginia, Charlottesville, VA (United States). Dept. of Materials Science and Engineering

Titanium matrix composites reinforced with sol-gel synthesized {alpha}-alumina fiber tows have attracted interest as a potentially low cost continuous fiber reinforced metal matrix composite system. The authors have conducted a detailed investigation of fiber damage during high temperature consolidation of PVD Ti-6Al-4V metallized sol-gel alumina fiber tows. Using both hot isostatic pressing and interrupted vacuum hot press consolidation cycles, the two principal mechanisms of fiber damage have been experimentally identified to be microbending/fracture and fiber matrix reaction. A time dependent micromechanics model incorporating the evolving geometry and mechanical properties of both the fibers and matrix has been formulated to simulate the fiber bending/failure mechanism in a representative unit cell and explore the effect of fiber strength loss due to reaction with the matrix. This model has been used to design a process cycle that minimizes damage by exploiting the enhanced superplastic deformation of the initially nanocrystalline PVD Ti-6Al-4V matrix.

• OSTI ID: 116112
• Journal Information: Acta Metallurgica et Materialia, Journal Name: Acta Metallurgica et Materialia Journal Issue: 10 Vol. 43; ISSN 0956-7151; ISSN AMATEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
ALUMINIUM OXIDES
CHEMICAL REACTIONS
COMPOSITE MATERIALS
DEFORMATION
FRACTURES
HOT PRESSING
MATHEMATICAL MODELS
SIMULATION
SOL-GEL PROCESS
TITANIUM BASE ALLOYS
VANADIUM ALLOYS