Nanostructured Zr- and Ti-based composite materials with high strength and enhanced plasticity

Journal Article · Thu Sep 01 00:00:00 EDT 2005 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.2012507· OSTI ID:20714094

Kuehn, U; Mattern, N; Gebert, A; Kusy, M; Bostroem, M; Siegel, U; Schultz, L ^[1]

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1. Leibniz-Institute for Solid State and Materials Research (IFW) Dresden, P.O. Box 270016, D-01171 Dresden (Germany)

Multicomponent composite materials with the compositions Zr{sub 66}Nb{sub 13}Cu{sub 8}Ni{sub 6.8}Al{sub 6.2} and Ti{sub 66}Nb{sub 13}Cu{sub 8}Ni{sub 6.8}Al{sub 6.2} were produced by copper mold casting, and their microstructure and their room-temperature mechanical properties were investigated. The specific alloys were developed to circumvent the limited ductility of Zr- and Ti-based bulk metallic glasses by the formation of a heterogeneous microstructure consisting of a nanocrystalline matrix and ductile dendritic bcc precipitates. Comparing the microstructure of both alloys, two significant differences were observed. The volume fraction of the dendritic bcc phase is higher for the Ti-based alloy and the formed interdendritic matrix phase(s) have a different structure. The two alloys show an excellent combination of strength and plastic strain. Especially the Ti-based alloy exhibits exceptional mechanical properties, such as high fracture stress of more than 2000 MPa and a plastic elongation to failure of almost 30%.

• OSTI ID: 20714094
• Journal Information: Journal of Applied Physics, Vol. 98, Issue 5; Other Information: DOI: 10.1063/1.2012507; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
BCC LATTICES
CASTING MOLDS
COMPOSITE MATERIALS
COPPER
COPPER ALLOYS
DUCTILITY
ELONGATION
FRACTURES
METALLIC GLASSES
MICROSTRUCTURE
NANOSTRUCTURES
NICKEL ALLOYS
NIOBIUM ALLOYS
PLASTICITY
PRESSURE RANGE GIGA PA
STRESSES
TEMPERATURE RANGE 0273-0400 K
TITANIUM ALLOYS
ZIRCONIUM ALLOYS