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Influence of Ni Addition on Mechanical Properties and Fracture Behaviors of Ir-15Nb Two-Phase Refractory Superalloys

  • Yuefeng Gu (a1), Y. Yamabe-Mitarai (a2), Y. Ro (a2), T. Yokokawa (a2) and H. Harada (a2)...

Abstract

Ir-based alloys with fcc-L12 two-phase coherent structure, which are called “refractory superalloys”, have good potentiality as structure materials used at ultra-high temperatures up to 2000 °C. Preliminary results showed that the refractory superalloys failed predominately by brittle intergranular fracture at room temperature even though they showed higher strength at that temperature. This paper will present the influence of nickel (Ni) addition on mechanical properties and fracture behaviors of one of these alloys, Ir-15at%Nb. The results indicated that Ni addition was beneficial to the compression ductility and strength of two-phase Ir-15at%Nb alloy when Ni content was below the optimum content.

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1. Yamabe, Y., Koizumi, Y., Murakami, H., Ro, Y., Maruko, T., and Harada, H.: Scripta Mat., 1996, vol. 35, pp. 211215.
2. Yamabe-Mitarai, Y., Koizumi, Y., Murakami, H., Ro, Y., Maruko, T., and Harada, H.: Scripta Mat., 1997, vol.36, pp. 393398.
3. Yamabe-Mitarai, Y., Koizumi, Y., Murakami, H., Ro, Y., Maruko, T., and Harada, H.: Mat. Res. Soc. Symp. Proc., 1997, vol.460, pp. 701706.
4. Yamabe-Mitarai, Y., Ro, Y., Maruko, T., Yokokawa, T., and Harada, H.: Structural Intermetallics, 1997, pp. 805814.
5. Yamabe-Mitarai, Y., Ro, Y., Maruko, T., and Harada, H.: Met. Trans., 1998, vol.29, pp. 537549.
6. Massalski, Thaddeus B.: Binary Alloy Phase Diagrams, 2nd ed., ASM Metals Park, OH, 1992, vol. 3.
7. Fleischer, R. L.: Acta Metal., 1963, vol.11, pp. 203209
8. Labusch, R.: Acta Met., 1972, vol.20, pp. 917927
9. Huber, K. P., and Herzberg, G. L.: Molecular Spectra and Molecular Structure IV, Constants of Diatomic Molecules, van Nostrand, New York, NY, 1979.
10. Reid, C. N. and Routbort, J. L.: Met. Trans., 1972, vol.3, pp. 2257–60.
11. Darling, A. S.: Intern. Met. Rev., 1973, vol.18, pp. 91122.
12. Chen, S. P.: Phil. Mag. A, 1992, vol.66, pp. 110.

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