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Rapidly Solidified Ti Alloys Containing Metalloids and Rare Earth Metals— Their Microstructure and Mechanical Properties

Published online by Cambridge University Press:  21 February 2011

C.S. Chi  and
S.H. Whang
C.S. Chi
Affiliation:
Barnett Institute of Chemical Analysis and Materials Science, Northeastern University, Boston, MA 02115
S.H. Whang
Affiliation:
Barnett Institute of Chemical Analysis and Materials Science, Northeastern University, Boston, MA 02115
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Abstract

Rapidly solidified (RS) Ti alloys containing novel additives were prepared by splat quenching and melt spinning techniques. Microstructures of the as-quenched and heat-treated alloys were studied by electron microscopies. The results show that microstructural refinement and precipitation reaction are universal phenomena in all RS Ti alloys. A significant difference in second phase coarsening was observed between metalloid-origin precipitates and those of rare earth-origin. The precipitates in a Ti-Al-La(Ce) were identified predominantly as rare earth-Al compounds. Exce llent stability for rare earth-origin precipitates was found.

Except for a carbon-containing alloy (700 ° C), age hardening behavior is a universal phenomenon in all RS Ti alloys with additives. A significant strength increase (hardness) in the RS alloy was noted at both room and elevated temperatures.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 28: Symposium F – Rapidly Solidified Metastable Materials , 1983 , 353
Copyright
Copyright © Materials Research Society 1984

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References

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