Hot Working of High-Purity Nickel-Niobium Alloys


Article Preview

The present work deals with the influence of niobium in solid solution on the dynamic recrystallization of pure nickel. High-purity nickel and two model nickel-niobium alloys were deformed to large strains via torsion at temperatures between 800 and 1000°C. Niobium additions considerably increased the flow stress, while they lowered the strain-rate sensitivity and increased the apparent activation energy. EBSD of the steady-state microstructures revealed strong grain refinement. Substructure development was favored, whereas thermal twinning was reduced by niobium. More generally, discontinuous recrystallization kinetics were considerably decreased.



Materials Science Forum (Volumes 539-543)

Main Theme:

Edited by:

T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran




F. Montheillet et al., "Hot Working of High-Purity Nickel-Niobium Alloys", Materials Science Forum, Vols. 539-543, pp. 2966-2971, 2007

Online since:

March 2007




[1] J. Le Coze, R. Tardy, A. Kobylanski and M. Biscondi: 1st Int. Conf. on Ultra High Purity Base Metals (UHPM-94), Kitakyushu-City, The Japan Institute of Metals, Sendai, Japan (1995), p.371.

[2] M.J. Luton and C.M. Sellars: Acta Metall. Vol 17 (1969), p.1033.

[3] L. Gavard: PhD Thesis, Ecole des Mines de Saint-Etienne/INPG (2001).

[4] B. Bayle, Ph. Bocher, J.J. Jonas and F. Montheillet: Mater. Sci. Technol. Vol. 15 (1999), p.803.

[5] J. -Ph. Thomas, Ch. Dumont, F. Montheillet and E. Bauchet: 10th Int. Symp. on Superalloys, Seven Springs, PA, USA (2004), p.959.