Deformation and fracture behavior of composite structured Ti-Nb-Al-Co(-Ni) alloys

Journal Article · Mon Feb 17 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4865930· OSTI ID:22283120

Marr, T.; Schultz, L.; Eckert, J. ^[1]; Kühn, U. ^[1]; Freudenberger, J. ^[1]; Oertel, C. -G.; Skrotzki, W. ^[2]

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1. IFW Dresden, Helmholtzstr. 20, D-01069 Dresden (Germany)
2. Institut für Strukturphysik, Technische Universität Dresden, D-01062 Dresden (Germany)

Tensile ductility of the Ti-based composites, which consist of a β-Ti phase surrounded by ultrafine structured intermetallics, is tunable through the control of intermetallics. The two Ti-based alloys studied exhibit similar compressive yield strength (about 1000 MPa) and strain (about 35%–40%) but show a distinct difference in their tensile plasticity. The alloy Ti{sub 71.8}Nb{sub 14.1}Ni{sub 7.4}Al{sub 6.7} fractures at the yield stress while the alloy Ti{sub 71.8}Nb{sub 14.1}Co{sub 7.4}Al{sub 6.7} exhibits about 4.5% of tensile plastic deformation. To clarify the effect of microstructure on the deformation behavior of these alloys, tensile tests were carried out in the scanning electron microscope. It is shown that the distribution as well as the type of intermetallics affects the tensile ductility of the alloys.

• OSTI ID: 22283120
• Journal Information: Applied Physics Letters, Vol. 104, Issue 7; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM ALLOYS
COBALT ALLOYS
DEFORMATION
DUCTILITY
FRACTURES
INTERMETALLIC COMPOUNDS
MICROSTRUCTURE
NIOBIUM ALLOYS
PLASTICITY
SCANNING ELECTRON MICROSCOPY
STRAINS
STRESSES
TITANIUM BASE ALLOYS
YIELD STRENGTH