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Microstructure of Ti-Based, Dendrite/Nanostructured-Matrix Composites

Published online by Cambridge University Press:  01 February 2011

Thomas G. Woodcock ,
Sonia Mato ,
Germán Alcalá ,
Guo He ,
Yinmin Wang ,
En Ma ,
Qunlong Dai ,
Manling Sui ,
Wolfgang Löser  and
Jürgen Eckert
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Thomas G. Woodcock
Affiliation:
IFW Dresden, Institute of Metallic Materials, Helmholtzstr. 20, D-01069 Dresden, Germany
Sonia Mato
Affiliation:
IFW Dresden, Institute of Metallic Materials, Helmholtzstr. 20, D-01069 Dresden, Germany
Germán Alcalá
Affiliation:
IFW Dresden, Institute of Metallic Materials, Helmholtzstr. 20, D-01069 Dresden, Germany
Guo He
Affiliation:
Light Materials Group, National institute for Materials Science, 1–2–1 Sengen, Tsukuba, Ibaraki 305–0047, Japan
Yinmin Wang
Affiliation:
Department of Materials Science and Engineering, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, USA
En Ma
Affiliation:
Department of Materials Science and Engineering, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, USA
Qunlong Dai
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, CAS, 72Wenhua Road, Shenyang, 110016, P.R. China
Manling Sui
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, CAS, 72Wenhua Road, Shenyang, 110016, P.R. China
Wolfgang Löser
Affiliation:
IFW Dresden, Institute of Metallic Materials, Helmholtzstr. 20, D-01069 Dresden, Germany
Jürgen Eckert
Affiliation:
IFW Dresden, Institute of Metallic Materials, Helmholtzstr. 20, D-01069 Dresden, Germany
Ludwig Schultz
Affiliation:
IFW Dresden, Institute of Metallic Materials, Helmholtzstr. 20, D-01069 Dresden, Germany
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Abstract

Electron microscopy of the composite-forming alloys Ti60Cu14Ni12Sn4Nb10 and Ti60Cu14Ni12Sn4Ta10, shows that for both alloys, the microstructure consists of an array of micron-scale dendrites surrounded by a nanoscale binary eutectic. In the Ta-containing alloy, one of the eutectic phases has been identified as having a bcc crystal structure similar to that of the dendrites. In the Nb-containing alloy, one of the eutectic phases has been found to have a similar composition to that of the dendrites. Further detailed structural and compositional characterization is needed in order to understand the solidification behaviour of such materials. This knowledge may then be used to improve the casting conditions and subsequent mechanical properties of the materials.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 806: Symposium MM – Amorphous and Nanocrystalline Metals , 2003 , MM8.11
Copyright
Copyright © Materials Research Society 2004

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References

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