Hostname: page-component-76fb5796d-qxdb6 Total loading time: 0 Render date: 2024-04-25T08:17:05.874Z Has data issue: false hasContentIssue false
  • English
  • Français

Axial Alignment of Short-Fiber Titanium Aluminide Composites by Directional Solidification

Published online by Cambridge University Press:  21 February 2011

S. L. Kampe ,
G. H. Swope  and
L. Christodoulou
S. L. Kampe
Affiliation:
Martin Marietta Laboratories 1450 S. Rolling Road Baltimore, Maryland 21227
G. H. Swope
Affiliation:
Martin Marietta Laboratories 1450 S. Rolling Road Baltimore, Maryland 21227
L. Christodoulou
Affiliation:
Martin Marietta Laboratories 1450 S. Rolling Road Baltimore, Maryland 21227
Get access

Abstract

The floating zone directional solidification technique has been applied to an XDTM short-fiber-reinforced titanium aluminide ingot in an effort to produce in situ alignment of the reinforcement. Microstructural evaluation reveals that a general alignment of the high aspect ratio (>100:1) fibers occurs under specific imposed solidification conditions. These metallographic observations are supported by 800 ° C mechanical data, which indicate higher axial and reduced transverse strengths relative to the unprocessed base material which contains a dispersion of randomly oriented fibers. The increased strengths are observed to be a consequence of an increase in the matrix hardening due to accommodation of plastic strain around the fiber reinforcement.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 194: Symposium R – Intermetallic Matrix Composites I , 1990 , 97
Copyright
Copyright © Materials Research Society 1990

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

1. Kelly, A. and Davies, G.J., Met. Rev. 10 (37), 1–77 (1965).Google Scholar
2. Christodoulou, L., Parrish, P.A., and Crowe, C.R. in High Temperature, High Performance Composites, edited by Lemkey, F.D., Fishman, S.G., Evans, A.G., and Strife, J.R. (Mater. Res. Soc. Proc. 120, Pittsburgh, PA 1988) pp. 29–34.Google Scholar
3. Aikin, R.M. and McCubbin, P., unpublished research, Martin Marietta Laboratories, 1990.Google Scholar
4. Valencia, J.J., McCullough, C., Rosler, J., Levi, C.G., and Mehrabian, R., in Solidification of Metal Matrix Composites, edited by Rohatgi, P. (TMS, Pittsburgh, 1989).Google Scholar
5. Blackburn, M.J. and Smith, M.P., AFWAL Technical Report TR-80-4175-1980 and TR-79-4056-1979.Google Scholar