Hostname: page-component-7bb8b95d7b-dvmhs Total loading time: 0 Render date: 2024-09-12T18:33:11.328Z Has data issue: false hasContentIssue false
  • English
  • Français

Mechanical Behavior of L12 Single Crystal AI66Ti25Mng

Published online by Cambridge University Press:  01 January 1992

S. A. Brown ,
D. P. Pope  and
K. S. Kumar
S. A. Brown
Affiliation:
Martin Marietta Laboratories, Baltimore, MD 21227
D. P. Pope
Affiliation:
Dept. of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104
K. S. Kumar
Affiliation:
Martin Marietta Laboratories, Baltimore, MD 21227
Get access

Abstract

Single crystal AI66Ti25Mng has been produced and tested in compression as a function of temperature and orientation. Yield strengths for orientations near [001] and [111] continuously decrease with increasing temperature in a manner similar to other single crystal L12 trialuminides, and also to polycrystals of these materials. Slip was determined to occur on the {111} octahedral planes using two-surface analysis. Critical resolved shear stress (CRSS) variation with temperature, calculated on {111} planes, overlap closely for both orientations. Dislocation analysis confirmed the Burgers vectors to be of the type a<110> at both 298K and 1073K. A limited number of uniaxial tension tests were conducted near [001] at 1073K; the HIPed specimens contained a small amount of residual porosity and second phases which resulted in lastic failure even at this high temperature.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 288: Symposium L – High-Temperature Ordered Intermetallic Alloys V , 1992 , 723
Copyright
Copyright © Materials Research Society 1995

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. George, E. R., Pope, D. P., Fu, C. L. and Schneibel, J. H., ISIJ International 31, 1063–1075 (1991).Google Scholar
2. Kumar, K. S. and Brown, S. A., Scripta Metall. et Mater. 26, 197–202 (1992).Google Scholar
3. Potez, L., Loiseau, A., Naka, S. and Lapasset, G., J. Mater. Res. 7, 876–882 (1992).Google Scholar
4. Wu, Z. Ph. D. Thesis, University of Pennsylvania (1992).Google Scholar
5. Kumar, K. S. and Brown, S. A., Philos. Mag. A 65, 91–109 (1992).Google Scholar
6. Kumar, K. S. and Brown, S. A., Acta Metall. et Mater. 40, 1923–1932 (1992).Google Scholar
7. Schneibel, J. H., Horton, H. A. and Porter, W. D., Mater. Sci. and Eng. 1992, Special issue: Proceedings of the International Conference on High-Temperature Aluminides and Intermetallics held in San Diego, CA, Sept. 1991 - in press.Google Scholar
8. Zhang, S., Nic, J. P. and Mikkola, D. E., Scripta Metall. et Mater. 24, 57–62 (1990).Google Scholar
9. Zhang, S. and Mikkola, D. E., Scripta Metall. et Mater. 26, 1315–1320 (1992).Google Scholar