THE EFFECT OF η-PHASE IN AN IRONNICKEL BASE SUPERALLOY
Ge Yunlong;Zhang Yongchang;Hou Cuiping Institute of Metal Research; Academia Sinica
Cite this article:
Ge Yunlong;Zhang Yongchang;Hou Cuiping Institute of Metal Research; Academia Sinica. THE EFFECT OF η-PHASE IN AN IRONNICKEL BASE SUPERALLOY. Acta Metall Sin, 1979, 15(2): 197-304.
Abstract The γ'-η transformation and the formation of the η-phase itself on the me-chanical properties and hot-workability of an iron-nickel base superalloy (Fe-42Ni-13Cr-6Mo-2.8Ti-0.3Al) has been studied. The formation of η-phase was promotedby increment of titanium content as well as by hot-working energy, and was re-tarded by the addition of aluminium, molybdenum and minute boron. when suchan alloy did contain certain amount of η-phase, its rupture strength and/or stress-rup-ture life were reduced although its ductility and hot-workability were increased.
[1] Beattie, H. J., Trans. AIME, 221 (1961) , 28. [2] Clark, B. R. and Pickering, F. B., J. Iron Steel Inst., London, 205 (1967) , 70. [3] Speich, G. R., Trans. AIME, 227 (1963) , 755. [4] Sullivan, C. P. and Donachie. M. J., Metals Eng. Quart., 11 (1971) , No. 4, 1. [5] Loomis, W. T., Met Trans., 3 (1972) , 989. [6] Merrick. H. F. and Nicholson, R. B., Proceedings of the 5th International Conference of Electron Microscopy, 1962. [7] Mibalisin, J. R. and Decker, R. F., Trans. AIME, 218 (1960) , 507.