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High-Temperature Fatigue Crack Propagation in P/M Ni3Al-B Alloys

  • K.-M. Chang (a1), S.C. Huang (a1) and A.I. Taub (a1)

Abstract

Ductile Ni3Al-B type intermetallic alloys show a unique fatigue crack growth behavior at elevated temperatures. A crack propagation mechanism has been investigated in an experimental P/M alloy by testing the alloys with different fatigue frequencies at 400°C. The Ni3Al-B intermetallic alloy shows a substantial time-dependence of fatigue cracl growth rate when tested in air. Under a given cyclic stress intensity, an order of magnitude difference of crack growth rate was observed by decreasing the fatigue frequency. However, such a time-dependence did not occur when the alloy was tested in vacuum. It is concluded that “dynamic” embrittlement in an oxidation environment is the major factor controlling the fatigue crack growth in ordered Ni3Al-B alloys at elevated temperatures.

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1. Taub, A.I., Huang, S.C., and Chang, K.-M.: Met. Trans. A, 1984, vol. 15A, p. 339.
2. Liu, C.T. and Koch, C.C.: “Technical Aspects of Critical Materials Use by the Steel Industry, vol. IIB,” National Bureau of Standards, NBSIR 83-2679-2, 1983, p. 42–1; also editor's note in Iron Age, September 24, 1982, p. 63.
3. Aoki, K. and Izumi, O.: J. Japan Inst. Met., 1979, vol. 43, p. 1190; ibid, 1979, vol. 43, p. 358.
4. Chang, K.-M., Huang, S.C., and Taub, A.I.: “Rapidly Solidified Ni Al-B Based Intermetallics,” GE-CRD Report No. 86CRD202, October 1989.
5. Fuchs, G.E., Kuruvilla, A.K., and Stoloff, N.S.: “High Cycle Fatigue and Crack Growth in Polycrystalline submitted to Met. Trans. A. Ni3Al”, submitted to Met. Trans. A.
6. Liu, C.T., White, C.L., and Horton, J.A.: Acta Met., vol. 33, p. 213.
7. Chang, K.-M.: "Improving Crack Growth Resistance of IN 718 Alloy Through Thermomechanical Processing," GE-CRD Report No. 85CRD187, October 1985.
8. Johnson, H.H.: Mat. Res. Stand., 1965, vol. 5, no. 9, p. 442.
9. Solomon, H.D. and Coffin, L.F.: ASTM STP 520, p. 112, 1973.

High-Temperature Fatigue Crack Propagation in P/M Ni3Al-B Alloys

  • K.-M. Chang (a1), S.C. Huang (a1) and A.I. Taub (a1)

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