Hostname: page-component-cd9895bd7-gvvz8 Total loading time: 0 Render date: 2024-12-26T07:28:45.566Z Has data issue: false hasContentIssue false
  • English
  • Français

Processing and Characterization of Al2Ti/Al 3Ti Two-Phase Alloys

Published online by Cambridge University Press:  10 February 2011

M. J. Lukitsch  and
J. E. Benci
M. J. Lukitsch
Affiliation:
Materials Science and Engineering, Wayne State University, Detroit, MI 48202
J. E. Benci
Affiliation:
Materials Science and Engineering, Wayne State University, Detroit, MI 48202
Get access

Abstract

Several buttons of each of three binary Ti-Al alloys containing nominally 70, 71 and 72 at.% Al were prepared from elemental Ti and Al by plasma arc-melting. One button of each composition was then either solution heat-treated, subjected to a two-step heat treatment, or hot forged. Each composition and material condition was then characterized using SEM/EDS and microhardness testing. The results show that while all three compositions have a predominantly two-phase, coarse microstructure in the as-cast condition, it is possible to produce an essentially single phase material through an appropriate solution heat treatment for the two lower Al content alloys. A fine two-phase microstructure can be achieved through an additional, lower temperature heat treatment step. The microhardness results show that the solution heat treatment reduced the hardness for all three compositions compared to the as-cast condition while hot forging as-cast samples increased hardness. The 70% Al alloy has the highest hardness for all four material conditions studied while the 71% Al alloy has the lowest hardness in three of the four material conditions.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 552: Symposium KK – High-Temperature Ordered Intermetallic Alloys VIII , 1998 , KK2.5.1
Copyright
Copyright © Materials Research Society 1999

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. Benci, J.E., Ma, J.C., and Feist, T.P., Mater. Sci. Eng., A192/193, 38–44 (1995).CrossRefGoogle Scholar
2. Ma, J.C., Benci, J.E., and Feist, T.P., Mat. Res. Soc. Proc., 364, 1303–1308 (1995).CrossRefGoogle Scholar
3. Benci, J.E. and Ma, J.C., in Structural Intermetallics 1997, edited by Nathal, M.V., Darolia, R., Liu, C.T., Miracle, D.B., Wagoner, R. and Yamaguchi, M., The Mineral, Metals & Materials Society, Warrendale, PA, 859–868 (1997).Google Scholar
4. Raman, A. and Schubert, K., Z. Metallkde., 56, 44–52 (1965).Google Scholar
5. Murray, J.L., in Binary Alloy Phase Diagrams, edited by Massalski, T.B., American Society for Metals, Metals Park, OH (1986).Google Scholar
6. Loiseau, A. and Vannuffel, C., Phys. Stat. Sol. A, 107, 655–671 (1988).CrossRefGoogle Scholar
7. Kaltenbach, K., Gama, S., Pinatti, D.G., and Schulze, K., Z. Metallkde., 80, 511–514 (1989).Google Scholar
8. Schuster, J.C. and Ipser, H., Z. Metallkde., 81, 389–396 (1990).Google Scholar