Hostname: page-component-cd9895bd7-hc48f Total loading time: 0 Render date: 2024-12-28T01:26:27.739Z Has data issue: false hasContentIssue false
  • English
  • Français

Rapid solidification of Ni3Al by Osprey deposition

Published online by Cambridge University Press:  31 January 2011

D.G. Morris  and
M.A. Morris
D.G. Morris
Affiliation:
Institute of Structural Metallurgy, University of Neuchâtel, 2000 Neuchâtel, Switzerland
M.A. Morris
Affiliation:
Institute of Structural Metallurgy, University of Neuchâtel, 2000 Neuchâtel, Switzerland
Get access

Abstract

A Ni3Al-based alloy containing Cr is examined after preparation by Osprey deposition. The microstructure consists of solidified spherical regions showing cellular segregation interspersed with regions of finer, equiaxed segregation morphology. The segregation structure is characterized by cell interiors rich in aluminum and poor in chromium, while the cell walls are poor in aluminum and rich in chromium. This segregation pattern is the inverse of that expected, based on earlier melt spinning experience, and is explained in terms of the undercooling of the melt prior to solidification. Very high temperature annealing is required to homogenize the material, despite the use of this rapid solidification process for material fabrication.

Type
Articles
Information
Journal of Materials Research , Volume 6 , Issue 2 , February 1991 , pp. 361 - 365
Copyright
Copyright © Materials Research Society 1991

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

1Evans, R. W., Leatham, A. G., and Brooks, R. G., Powder Metallurgy 28, 13 (1985).CrossRefGoogle Scholar
2Horton, J. A. and Liu, C. T., Acta Metall. 33, 2191 (1985).CrossRefGoogle Scholar
3Cahn, R. W., in High Temperature Ordered Intermetallic Alloys II, edited by Stoloff, N. S., Koch, C. C., Liu, C. T., and Izumi, O. (Mater. Res. Soc. Symp. Proc. 81, Pittsburgh, PA, 1987), p. 27.Google Scholar
4Cahn, R. W., Siemers, P. A., and Hall, E. L., Acta Metall. 35, 2753 (1987).CrossRefGoogle Scholar
5Morris, D. G. and Morris, M. A., Philos. Mag. A61, 469 (1990).CrossRefGoogle Scholar
6Maurer, R., Galinski, G., Laug, R., and Kaysser, W. A., in High Temperature Ordered Intermetallic Alloys III, edited by Liu, C. T., Taub, A. I., Stoloff, N. S., and Koch, C. C. (Mater. Res. Soc. Symp. Proc. 133, Pittsburgh, PA, 1989), p. 421.Google Scholar
7Baker, I., Horton, J. A., and Schulson, E. M., Metallography 19, 63 (1986).CrossRefGoogle Scholar
8Carro, G., Bertero, G. A., Wittig, J. E., and Flanagan, W. F., in High Temperature Ordered Intermetallic Alloys III, edited by Liu, C. T., Taub, A. I., Stoloff, N. S., and Koch, C. C. (Mater. Res. Soc. Symp. Proc. 133, Pittsburgh, PA, 1989), p. 535.Google Scholar
9Huang, S. C., Chang, K. M., Halland, E. L., and LaForce, R. P., in High Temperature Ordered Intermetallic Alloys, edited by Koch, C. C., Liu, C. T., and Stoloff, N. S. (Mater. Res. Soc. Symp. Proc. 39, Pittsburgh, PA, 1985), p. 125.Google Scholar