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The Effects of La on Rapidly Solidified Al – 66 at.% NI

Published online by Cambridge University Press:  16 February 2011

Baode Sun ,
Yaohe Zhou ,
Hul Lin  and
Dongllang Lin
Baode Sun
Affiliation:
Department of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, P. R. China
Yaohe Zhou
Affiliation:
Department of Materials Science and Engineering, Northwestern Polytechnic University, Xi'an 710072, P. R. China
Hul Lin
Affiliation:
Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA
Dongllang Lin
Affiliation:
Department of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, P. R. China
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Abstract

This paper investigates the microstructure and ductility of Al - 66 at.% Ni by means of melt spinning technology combined with La microalloying. It shows that the Al - 66 at.% Ni without La exhibits coarse equiaxed martensite grains with Ni3Al precipitating at the grain boundaries (GBs). An addition of 0.05 wt.% La suppresses the precipitation of Ni3Al and a microstructure of complete martensite is obtained. When the amount of La is 0.2∼0.8 wt.%, a “supersaturated” single phase of B2 structure NiAl results. The elongation of Al - 66 at.% Ni without La is only 0.8%. When 0.05, 0.2, and 0.8 (wt.%) La are added to the alloy, their elongations can be as high as 2.6, 3.0, and 3.2% respectively. This shows that the elongation increases with increasing La content. The microstructural morphology and the ductility enhancement mechanism are discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 360 , 1994 , 479
Copyright
Copyright © Materials Research Society 1995

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References

1.Au, Y. K. and Wayman, C. M., Scripta Metall. 6, 1209 (1972).Google Scholar
2.Smialek, J. L. and Hehemann, R. F., Metall. Trans. 4, 1571 (1973).Google Scholar
3.McLean, D. and Northcott, L., JISI 158, 169 (1948).Google Scholar
4.Aziz, M. J., J. Appl. Phys. 53, 1158 (1982).Google Scholar
5.Cooper, M. J., Philos. Mag. 89, 811 (1963).Google Scholar
6.Fox, A. G. and Tabberner, M. A., Acta Metall. Mater. 39, 669 (1991).Google Scholar