Hostname: page-component-77c89778f8-n9wrp Total loading time: 0 Render date: 2024-07-18T13:02:34.678Z Has data issue: false hasContentIssue false
  • English
  • Français

Phase and Microstructure of Fe Modified A13 Ti

Published online by Cambridge University Press:  26 February 2011

W. D. Porter ,
K. Hisatsune ,
C. J. Sparks ,
W. C. Oliver  and
W. C. Oliver
W. D. Porter
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6117
K. Hisatsune
Affiliation:
School of Dentistry, Nagasaki University, Nagasaki 852, Japan
C. J. Sparks
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6117
W. C. Oliver
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6117
W. C. Oliver
Affiliation:
E. I. du Pont, Chattanooga, TN 37415
Get access

Abstract

Alloys of Al75-xFexTi25, where x = 0 to 12 at. % Fe, were fabricated by splat cooling and examined primarily with X-ray diffraction to determine the crystallographic phases present, their composition, volume fraction, lattice parameters, and sublattice occupation. The tetragonal DO22 structure of Al3Ti dissolved 0.8 ± 0.4 at. % Fe, with additional iron partitioned to the Ll2 structure containing 6.2 ± 0.4 at. % Fe, and completed the transformation to the Ll2 structure with the addition of about 6 at. % Fe. The lattice parameters of both phases were independent of iron concentration up to about 6 at. %. At 8 at. % Fe, the iron was found to be predominantly distributed on the nominal aluminum sublattice which also contained about 5 at. % Ti. The Al3 Ti composition was similarly found to contain about 5 at. % Ti on the aluminum sublattice. All compositions, including a single crystal of Al67Fe8 Ti25, were found to be brittle.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 133: Symposium H – High-Temperature Ordered Intermetallic Alloys III , 1988 , 657
Copyright
Copyright © Materials Research Society 1989

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Villars, P. and Calvert, L. D., Pearson's Handbook of Crystallographic Data for Intermetallic Phases, American Society for Metals, Metals Park, OH, 1985, vol.1, p. 476.Google Scholar
2. Yamaguchi, M., Umakoshi, Y., and Yamane, T., p. 275 in Proc. MRS Symp. High- Temperature Ordered Intermetallic Alloys, vol.81, ed. Stoloff, N. S., Koch, C. C., Liu, C. T., and Izumi, O., MRS Publication, 1987.Google Scholar
3. Raman, A. and Schubert, K., Z. Metall. 56, 99 (1965).Google Scholar
4. Seibold, A., Z. Metall. 72, 712 (1981).Google Scholar
5. Metals Handbook, 8th Edition, vol.1, ed. Lyman, T., American Society for Metals, Metals Park, OH, 1961, pp. 1153–56.Google Scholar
6. Porter, W. D. and Oliver, W. C., presented at the TMS-AIME Annual Meeting, Phoenix, AZ, January 25–28, 1988.Google Scholar
7. Nicholson, D. M., private communication, 1988.Google Scholar
8. Nicholson, D. M., Stocks, G. M., Temmerman, W. M., Sterne, P., and Pettifor, D. G., ”Structural Energy Differences in Al3Ti: The Role of Tetragonal Distortion in APB and Twin Energies,” this conference.Google Scholar
9. Laudise, R. A., The Growth of Single Crystals, Prentice-Hall, Inc., Englewood Cliffs, NJ, 1971, p. 55.Google Scholar
10. Tarnaki, J. and Kim, Y.-W., Scr. Metall. 22, 329 (1988).Google Scholar
11. Cullity, B. D., Elements of X-ray Diffraction, Addison-Wesley, Reading, MA, 1978, pp. 383–411.Google Scholar