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High-Temperature Mechanical Behavior of B2 Type IrAl Doped With Ni

Published online by Cambridge University Press:  15 February 2011

A. Chiba ,
T. Ono ,
X. G. Li  and
S. Takahashi
A. Chiba
Affiliation:
Department of Materials Science and Engineering, Iwate University, Morioka 020, Japan.
T. Ono
Affiliation:
Department of Materials Science and Engineering, Iwate University, Morioka 020, Japan.
X. G. Li
Affiliation:
Department of Materials Science and Engineering, Iwate University, Morioka 020, Japan.
S. Takahashi
Affiliation:
Department of Materials Science and Engineering, Iwate University, Morioka 020, Japan.
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Abstract

Constant-velocity and constant-load compression tests have been conducted to examine the mechanical behavior of polycrystalline IrAl and Ir1-xNixAl at ambient and elevated temperatures. Although IrAl exhibits brittle fracture before or immediately after yielding below 1073K, steady-state deformation takes place at temperatures higher than 1273K. Ductility of Ir1-xNixAl is improved with increasing x. On the contrary, strength decreases with increasing x. IrAl exhibits the 0.2% flow stress of 1200MPa at 1073K and 350MPa at 1473K, about an order of magnitude higher than NiAl. Secondary creep of IrAl and Ir0.2Ni0.8Al(i.e., modified NiAl) exhibits class II and class I behavior respectively. Creep strength of binary IrAl and modified NiAl with Ir is about a magnitude of 4 higher than that of single-phase and multi-phase NiAl at a given applied stress.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 460: Symposium Z – High-Temperature Ordered Intermetallic Alloys VII , 1996 , 707
Copyright
Copyright © Materials Research Society 1997

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References

REFERENCES

[1] Axler, K. M., Foltyn, E. M., Peterson, D. E. and Hutchinson, W. B., J. Less- Common Met., 156 (1989), 213.Google Scholar
[2] Ono, T., Chiba, A., Li, X. G. and Takahashi, T., submitted to Mater. Trans. JIM.Google Scholar
[3] Noebe, R.D., Browman, R.R., Cullers, C.L. and Raj, S.V., in High Temperature Ordered Intermetallic Alloys IV, edited by Johnson, L. A., Pope, D. P. and Stiegler, J. O., Mater. Res. Soc. Symp. Proc., 213, 589 (Pittsburgh, 1991).Google Scholar
[4] Miracle, D. B., Acta Metall. mater, 41, 649(1993).Google Scholar
[5] Senba, H. and Igarashi, M., Mater. Trans. JIM, 4, 821 (1996).Google Scholar
[6] Whittenberger, J. D., J. Mater. Sci, 22, 394(1987).Google Scholar
[7] Nathal, M. V., Ordered Intermetallics-Physical Metallurgy and Mechanical Behaviour, edited by Liu, C. T., Cahn, R. W. and Sauthoff, G., 541 (1992).Google Scholar