Abstract
The effect of high cooling rate of approximately 102 K/s and subsequent hot isostatic pressure (HIP) and high temperature (HT) treatment on the microstructure and mechanical properties of NiAl-based intermetallic alloys was investigated. The results reveal that rapid solidification refines the microstructure of the NiAl-Cr(Mo)-0.5Hf eutectic alloy and transforms the Ni2AlHf Heusler phase, which is present in the equilibrium state to a metastable Hf(Ni, Al, Cr) solid solution phase. Simultaneously, the shape and distribution of the Hf(Ni, Al, Cr) solid solution phase were considerably improved. After the HIP treatment, the Hf(Ni, Al, Cr) solid solution phase has changed from continuous distribution along eutectic cell boundaries into semicontinuous distribution, and the primary NiAl(Cr, Mo) phase has coarsened. The HT treatment reduces the volume fraction of the primary NiAl(Cr, Mo) phase and optimizes the distribution of the Hf(Ni, Al, Cr) solid solution phase. Rapid solidification and the resulting fine-grained microstructure will significantly improve the mechanical properties of the alloy in compression tests. However, additional HIP and HT treatments enhance the high-temperature strength properties obviously.
References
D.B. Miracle, Overview No 104. The Physical and Mechanical Properties of NiAl, Acta Metall. Mater., 1993, 41(3), p 649–684
R.D. Noebe and R.R. Bowman, Physical and Mechanical Properties of the B2 Compound NiAl, Int. Mater. Rev., 1993, 38(4), p 193–232
J.T. Guo, Ordered Intermetallic Compound NiAl Alloy, Science Press, Beijing, 2003, p 105–120
A. Misra and R. Gibala, Plasticity in Multiphase Intermetallics, Intermetallics, 2000, 8(9–11), p 1025–1034
H.E. Cline and J.L. Walter, The Effect of Alloy Additions on the Rod-Plate Transition in the Eutectic NiAl-Cr, Metall. Trans., 1970, 1, p 2907–2917
G. Frommeyer and R. Rablbauer, Defect Properties and Related Phenomena in Intermetallic Alloys, MRS Symp. Proc., Vol. 753, E.P. George, H. Inui, M.J. Mills, and G. Eggeler, Ed., Warrendale, PA, 2003, p 193–208
R. Fischer, G. Frommeyer, and A. Schneider, APFIM Investigations on Site Preferences Superdislocations, and Antiphase Boundaries in NiAl(Cr) with B2 Superlattice Structure, Mater. Sci. Eng. A, 2003, 353(1–2), p 87–91
X.F. Chen, D.R. Johnson, R.D. Noebe, and B.F. Olliver, Deformation and Fracture of a Directionally Solidified NiAl-28Cr-6Mo Eutectic Alloy, J. Mater. Res., 1995, 10(5), p 1159–1170
J.M. Yang, S.M. Jeng, K. Bain, and R.A. Amato, Microstructure and Mechanical Behavior of In Situ Directional Solidified NiAl/Cr(Mo) Eutectic Composite, Acta Mater., 1997, 45(1), p 295–308
J.T. Guo, C.Y. Cui, Y.H. Qi, and H.Q. Ye, Microstructure and Elevated Temperature Mechanical Behavior of Cast NiAl-Cr(Mo) Alloyed with Hf, J. Alloys Compd., 2002, 343(1–2), p 142–150
J.T. Guo, L.Y. Sheng, Y.X. Tian, L.Z. Zhou, and H.Q. Ye, Effect of Ho on the Microstructure and Compressive Properties of NiAl-Based Eutectic Alloy, Mater. Lett., 2008, 62(23), p 3910–3912
L.Y. Sheng, J.T. Guo, Y.X. Tian, L.Z. Zhou, and H.Q. Ye, The Effect of High Magnetic Field Treatment on the Microstructure and Mechanical Properties of NiAl-Cr(Mo)-02Hf Eutectic alloy, Acta Metall. Sin., 2008, 44(5), p 524–528 (in Chinese)
L.Y. Sheng, J.T. Guo, L.Z. Zhou, and H.Q. Ye, The Effect of Strong Magnetic Field Treatment on Microstructure Room Temperature Compressive Properties of NiAl-Cr(Mo)-Hf Eutectic Alloy, Mater. Sci. Eng. A, 2009, 500(1–2), p 238–243
L.Y. Sheng, J.T. Guo, and H.Q. Ye, Microstructure and Mechanical Properties of NiAl-Cr(Mo)/Nb Eutectic Alloy Prepared by Injection-Casting, Mater. Des., 2009, 30(4), p 964–969
L.Y. Sheng, J.T. Guo, L.Z. Zhou, and H.Q. Ye, Microstructure and Mechanical Properties of Rapidly Solidified NiAl-Cr(Mo) Eutectic Alloy Doped with Trace Dy, J. Alloys Compd., 2009, 475(1–2), p 730–734
M. Probst-Hein, A. Dlouhy, and G. Eggeler, Interface Dislocations in Superalloy Single Crystals, Acta Mater., 1999, 47(8), p 2497–2510
T.B. Massalski, Handbook of Ternary Diagrams, ASM International, Materials Park, OH, 1995, p 1250–1255
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Sheng, L.Y., Nan, L., Zhang, W. et al. Microstructure and Mechanical Properties Determined in Compressive Tests of Quasi-Rapidly Solidified NiAl-Cr(Mo)-Hf Eutectic Alloy After Hot Isostatic Pressure and High Temperature Treatments. J. of Materi Eng and Perform 19, 732–736 (2010). https://doi.org/10.1007/s11665-009-9526-3
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DOI: https://doi.org/10.1007/s11665-009-9526-3