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Powder Metallurgy Processing of Ti-48Al-2Nb-2Cr(at%) Alloys

Published online by Cambridge University Press:  01 January 1992

G.E. Fuchs
G.E. Fuchs*
Affiliation:
General Electric Company, P.O. Box 1072, Schenectady, NY 12301-1072
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Abstract

The effect of processing on the microstructures and properties of powder metallurgy processed Ti-48Al-2Nb-2Cr alloys was examined. Both gas atomization (GA) and plasma rotating electrode process (PREP) techniques were used to produce pre-alloyed powder of the desired composition. The powders were then consolidated by either HIPing or extrusion. The effects of HIP temperature (1090°-1300°C) and HIP pressure (103MPa and 172MPa) were examined during HIP consolidation of GA powders. In addition, some of the PREP and GA HIPed materials were subsequently hot worked by isothermal forging. The tensile properties of these materials were determined in air in the temperature range 25°-1000°C. These results were then compared with previous data for I/M materials. The inter-relationship of processing, microstructure and properties was examined.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 288: Symposium L – High-Temperature Ordered Intermetallic Alloys V , 1992 , 847
Copyright
Copyright © Materials Research Society 1995

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References

REFERENCES

1.) Lipsitt, H.A., Proc. Mat Res. Soc., 33, pp. 351–364 (1984).Google Scholar
2.) Kim, Y.W., Microstructure/Property Relationships in Ti-Aluminides and Alloys, Eds. Kim, Y.W. and Boyer, R.R., TMS, p. 91–103 (1991).Google Scholar
3.) Kim, Y.W., JOM, 41, pp. 24–30 (1989).Google Scholar
4.) Kim, Y.W., JOM, 43, pp. 40–47 (1991).Google Scholar
5.) Yolton, C.F. and Eylon, D., “Effect of Processing History and Heat Treatment on the Microstructure and Mechanical Properties of Consolidated Gamma Titanium Aluminide Powder”, Seventh World Conference on Titanium, TMS, San Diego, CA, 6/28-7/2/92.Google Scholar
6.) McCullough, C., Valencia, J.J., Levi, C.G. and Mehrabian, R., Mat. Sci. Eng., A124, pp. 83–101 (1990).Google Scholar
7.) McCullough, C., Valencia, J.J., Levi, C.G. and Mehrabian, R., Acta Met., 37, pp. 1321–1336 (1989).Google Scholar
8.) Choi, B.W., Deng, Y.G., McCullough, C., Paden, B. and Mehrabian, R., Acta Met., 38, pp. 2225–2243 (1990).Google Scholar
9.) Ohls, M.A., Nachtrab, W.T. and Roberts, P.R., Processing and Properties of Gamma Titanium Aluminide Sheet Produced from PREP Powders. In P/M in Aerospace and Defense Technologies Symposium, Metal Powder Industry Federation, March 4-6, 1991, Tampa, Fl.Google Scholar
10.) Shih, D.S., Scarr, G.K. and Chesnutt, J.C., Mat. Res. Soc, 133, pp.. 167–172 (1989).Google Scholar
11.) Fuchs, G.E. and Hayden, S.Z., Mat. Sci Eng., A152, pp 227–282 (1992).Google Scholar
12.) Fuchs, G.E., “The Effect of Processing on the Microstructure and Tensile Properties of a γ-TiAl Based Alloy”, Seventh World Conference on Titanium, San Diego, CA, 6/28 7/2/92.Google Scholar