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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

REFERENCES

1. Grant, N.J., U.S. Patent 3,070,468 (December 25, 1962).Google Scholar
2. Whang, S.H., J. Metals, April, 1984.Google Scholar
3. Chi, C.S. and Whang, S.H., AIME Paper Selections F83–14 (October, 1983).Google Scholar
4. Whang, S.H., Lu, Y.Z. and Giessen, B.C., see proceedings of this symposiumGoogle Scholar
5. Sastry, S.M.L., Peng, T.C., O'Neal, J.E., and Beckerman, L.P., Proc. 3rd Rapid Solidification Processing, Mehrabian, R., NBS, MD, p579 (1982).Google Scholar
6. Darken, L.S. and Gurry, R.W., Physical Chemistry of Metals (McGraw-Hill, New York, 1953) pp86–90.Google Scholar
7. Chelikowsky, J.R., Phys. Rev. B19, 686 (1979).10.1103/PhysRevB.19.686Google Scholar
8. Alonso, J.A. and Simozar, S., Phys. Rev. B22, 5583 (1980).10.1103/PhysRevB.22.5583Google Scholar
9. Jones, H., see proceedings of this symposium.Google Scholar
10. Chi, C.S. and Whang, S.H., to be submitted to Met. Trans. A.Google Scholar
11. Horwath, J.A. and Mondolfo, L.F., Acta Met., 10, 1037 (1962).10.1016/0001-6160(62)90072-XGoogle Scholar
12. Spear, R.E. and Gardner, G.R., Trans Amer. Foundrymen's Soc., 71, 209 (1963).Google Scholar
13. Flower, H.M., Swann, P.R., and West, D.R.F., Met. Trans. 2, 3289 (1971).10.1007/BF02811609Google Scholar
14. Graham, D.E. and Koss, D.A., Met. Trans A, 9A, 1435 (1978).10.1007/BF02661815Google Scholar
15. Chi, C.S., Lu, Y.Z. and Whang, S.H., paper presented at 1983 Fall AIME meeting, Philadelphia, PA, to be published.Google Scholar