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The Mechanical Properties of Fe-36.5Al and its Cr or ti Containing Alloys at Elevated Temperature

Published online by Cambridge University Press:  22 February 2011

Dingqiang Li ,
Yi Liu ,
Aidang Shan  and
Dongliang Lin
Dingqiang Li
Affiliation:
Department of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, P. R. China.
Yi Liu
Affiliation:
Department of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, P. R. China.
Aidang Shan
Affiliation:
Department of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, P. R. China.
Dongliang Lin
Affiliation:
Department of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, P. R. China.
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Abstract

The mechanical properties of B2 structural FeAl alloys, prepared by hot rolling, at elevated temperatures have been measured by tensile tests. The alloys of Fe-36.5at.%A1, Fe-36.5at.%A1-5at.%Cr and Fe-36.5at.%Al-2at.%Ti were taken for tensile tests at a temperature range from room temperature to 1000°C. The fracture surfaces of these alloys were observed by SEM. The results showed that elongations of these alloys increased with increasing temperature when the testing temperatures were above 600°C. All the maximum elongations of these alloys appeared at 1000°C and those of Fe-36.5A1, Fe-36.5Al-5Cr, and Fe-36.5Al-2Ti alloys were 120%, 183% and 208% respectively. Fracture surfaces showed that failure of these alloys was by a combination of intergranular fracture and transgranular cleavage below 700°C. but showed a ductile fracture above 700°C. The ductility and strength of ternary alloys were higher than that of binary FeAl alloy at elevated temperatures, especially at high temperature. The <111> dislocations and helices have been observed in Fe-36.5A1 alloy by TEM. The large elongation of FeAl alloy at high temperature resulted from <111> dislocations slipping and <111> helices climbing.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 231
Copyright
Copyright © Materials Research Society 1995

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References

1 Mendiratta, M. G., Kim, H. K. and Lipsitt, H. A., Metall. Trans. A, 15A, 395 (1984).Google Scholar
2 Umakoshi, Y. and Yamaguchi, M., Phil. Mag. A, 41, 573 (1980).Google Scholar
3 Umakoshi, Y. and Yamaguchi, M., Phil. Mag. A, 44, 711 (1981).Google Scholar
4 Groves, G. W. and Kelly, A., Phil. Mag., 8, 877 (1963).Google Scholar
5 Massalski, T. B., ed., Binary Alloy Phase Diagrams, (Metals Park, OH, ASM, 1986), pp. 112 Google Scholar
6 Liu, C. T., Mckamey, C. G. and Horton, J. A., Scripta Metall., 122, 1679 (1988).Google Scholar
7 Shan, A. D. and Lin, D. L., Scripta Metall., 27, 95 (1992).Google Scholar
8 Mendiratta, M. G., Ehlers, S. K., Chatterjee, D. K. and Lipsitt, H. A., in Proc. 3rd. Int. Conf. on Rapid Solidification Processing: Materials and Technologies, ed. Mehrabian, R., (Gaithersburg, MD, NBS, 1983), pp. 240.Google Scholar
9 Diehm, R. S. and Mikkola, D. E., MRS Symp. Proc., 81, 329 (1987).Google Scholar
10 Baker, I. and Gaydosh, D. J., Mater. Sci. Eng., 96, 147 (1987).Google Scholar
11 Gaydosh, D. J., Draper, S. L. and Nathal, M. V., Metall. Trans. A, 20A, 1701 (1989).Google Scholar
12 Tiran, R. H., Vedula, K. M. and Anderson, G. G., MRS Symp. Proc., 39, 309 (1985).Google Scholar
13 Mendiratta, M. G., Ehlers, S. K., Dimiduk, D. M., et al., MRS Symp. Proc., 81, 393 (1987).Google Scholar