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Microstructure and Room-Temperature Ductility of Unidirectionally Grown Ni3Al

Published online by Cambridge University Press:  01 January 1992

Toshiyuki Hirano  and
Toshio Mawari
Toshiyuki Hirano
Affiliation:
National Research Institute for Metals, 1-2-1, Sengen, Tsukuba, Ibaraki 305, Japan
Toshio Mawari
Affiliation:
National Research Institute for Metals, 1-2-1, Sengen, Tsukuba, Ibaraki 305, Japan
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Abstract

The formation mechanism of the columnar-grained stoichiometric Ni3Al by FZ-UDS (unidirectional solidification using a floating zone method) was investigated. The quenched solidification interface showed that Ni3Al and β-NiAl formed simultaneously in the form of lamellar structure at the interface. The β-NiAl dissolved into the Ni3Al matrix during cooling, resulting in the columnar-grained structure of single phase Ni3Al at room temperature. The columnar-grained Ni3Al had a large number of low angle boundaries and exhibited a large tensile ductility. The characteristics of the deformation behavior were also investigated. Slip lines easily transferred acros.s grain boundaries without crack initiation. Deformed bands with many stacking faults were produced by deformation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 288: Symposium L – High-Temperature Ordered Intermetallic Alloys V , 1992 , 691
Copyright
Copyright © Materials Research Society 1995

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References

REFERENCES

1. Aoki, K. and Izumi, O., J. Jpn. Inst. Metals 43, 1190 (1979).Google Scholar
2. Hirano, T., Acta metall. mater. 38, 2667 (1990).Google Scholar
3. Hirano, T. and Kainuma, T.. ISIJ International 31, 1134 (1991).Google Scholar
4. Hirano, T., Chung, S.S., Mishima, Y., and Suzuki, T., Mat. Res. Soc. Symp. Proc. 213, 635 (1991).Google Scholar
5. Liu, C.T., White, C.L., and Horton, J.A., Acta metall. 33, 213 (1985).Google Scholar
6. Enami, K., Nenno, S., and Shimizu, K., Trans. JIM 14. 161 (1973).Google Scholar
7. Nourbakhshi, S. and Chen, P., Acta metall. 37, 1573 (1989).Google Scholar
8. Massalski, T. B., ed. Binary Alloy Phase Diagrams, (American Soc. for Metals, Metals Park, OH. 1986) pp.140.Google Scholar
9. Watanabe, T., in 6th Int. Conf. on Intergranular and Interphase Boundaries in Materials, edited by Polychroniadis, E.K., June 22-26, 1992, Thessaloniki, Greece, (Materials Science Forum) in press.Google Scholar
10. Enami, K. and Nenno, S., J. Phys. Soc. Japan, 25, 1517 (1968).Google Scholar
11. Veyssiere, P., Douin, J., and Beauchamp, P., Phil. Mag. A, 51. 469 (1985).Google Scholar
12. Pestman, B.J. and de Hosson, J.Th.M. Acta metall. mater. 40, 2511(1992).Google Scholar