Dynamic Recrystallization Mechanisms of Nickel Niobium Alloys during Hot Working

Abstract:

This present work examines the influence of niobium in solid solution on the microstructural evolution of pure nickel at various deformation conditions. On this purpose, high-purity nickel and six model nickel-niobium alloys (Ni–0.01, 0.1, 1, 2, 5 and 10 wt. % Nb) were subjected to hot torsion test to large strains within the temperature range from 800 to 1000 °C at strain rates of 0.03, 0.1 and 0.3 s^–1. Microstructural analyses were carried out using both optical and scanning electron microscopy-based electron back-scattered diffraction technique. The overall results showed the key role played by the Nb amount when coupled with various DRX mechanisms involved, i.e. DDRX, CDRX, and GDRX with respect to the prescribed deformation conditions, in reducing grain size and retarding DRX kinetics from which the microstructures of the examined materials such as Ni 2 and 10 wt. % Nb were seen evolving in different ways. In all these deformed materials, a transition from discontinuous dynamic recrystallization to continuous dynamic recrystallization was observed at low temperature and high strain rate whereas only discontinuous dynamic recrystallization occurred at high temperature.

• Periodical: Materials Science Forum (Volume 1016)
• Pages: 869-874
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1016.869
• Online since: January 2021
• Authors: Nadjoua Matougui*, Mohamed Lamine Fares, David Piot
• Keywords: Dynamic Recrystallization, EBSD, Hot Working, Microstructures, Nickel Based-Superalloys, Nickel Niobium Alloys

References

[1] P M. Mignanelli, N G. Jones, K M. Perkins, M C. Hardy and H J. Stone, Microstructural evolution of a delta containing nickel-base superalloy during heat treatment and isothermal forging, J. Mater. Sci. Eng. A. 621 (2015) 265-271.

DOI: 10.1016/j.msea.2014.10.071

[2] H J. McQueen, C A. Imbert, Dynamic recrystallization: plasticity enhancing structural development, J. Alloys and Compounds. 378 (2004) 35-43.

DOI: 10.1016/j.jallcom.2003.10.067

[3] S. Gourdet, F. Montheillet, An experimental study of the recrystallization mechanism during hot deformation of aluminum, J. Mater. Sci. Eng. A. 283 2000 274-288.

DOI: 10.1016/s0921-5093(00)00733-4

[4] M J. Luton, C M. Sellars, Dynamic Recrystallization in Nickel and Nickel-Iron Alloys During High Temperature Deformation, J. Acta Metallurgica.. 17(8) (1969) 1033-1043.

DOI: 10.1016/0001-6160(69)90049-2

[5] Y. Wang, W Z. Shao, L. Zhen and X M. Zhang, Microstructure evolution during dynamic recrystallization of hot deformed superalloy 718, J. Mater. Sci. Eng. A. 486 (2008) 321-332.

DOI: 10.1016/j.msea.2007.09.008

[6] D F. Li, Q M. Guo, S L. Guo, H J. Peng and Z G. Wu, The microstructure and nucleation mechanisms of dynamic recrystallization in hot deformed Inconel 625 superalloy, J. Mater. Des. 32 (2011) 696-705.

DOI: 10.1016/j.matdes.2010.07.040

[7] Q. Guo, D. Li, S. Guo, H. Peng and J. Hu, The effect of deformation temperature on the microstructure evolution of Inconel 625 superalloy, J. Nuclear Materials. 414 (2011) 440-450.

DOI: 10.1016/j.jnucmat.2011.05.029

[8] A. Devaux, L. Nazé, R. Molins, A. Pineau, A. Organista, J Y. Guédou, J F. Uginet and P. Héritier, Gamma double prime precipitation kinetic in Alloy 718, J. Mater. Sci. Eng. A. 486 (2008) 117-122.

DOI: 10.1016/j.msea.2007.08.046

[9] P M. Magnanelli, N G. Jones, M C. Hardy and H J. Stone, The influence of Al:Nb ratio on the microstructure and mechanical response of quaternary Ni–Cr–Al–Nb alloys, J. Mater. Sci. Eng. A. 612 (2014) 179-186.

DOI: 10.1016/j.msea.2014.06.021

[10] M. Hillert, B. Sundman, A treatment of the solute drag on moving grain boundaries and phase interfaces in binary alloys", J. Acta Metallurgica. 24(8) (1976) 731-743.

DOI: 10.1016/0001-6160(76)90108-5

[11] N. Matougui, D. Piot, M L. Fares, F. Montheillet and S L. Semiatin, Influence of niobium solutes on the mechanical behaviour of nickel during hot working, J. Mater. Sci. Eng. A. 586 (2013) 350-357.

DOI: 10.1016/j.msea.2013.07.079

[12] N. Matougui, M.L. Fares, Influence of niobium solutes on the microstructural evolution of nickel during hot working, J. Mater. Res. Express. 6 (2019) 126538.

DOI: 10.1088/2053-1591/ab53f9

[13] Wen. Tu, Tresa M. Pollock, Grain scale straining processes during high temperature compression of a disk alloy, Superalloys 2008 TMS (The Minerals, Metals & Materials Society). (2008) 393-403.

DOI: 10.7449/2008/superalloys_2008_395_403

[14] C. Castan. F. Montheillet and A. Perlade, Dynamic recrystallization mechanisms of an Fe-8% -Al low density steel under hot rolling conditions, J. Scripta Materialia. 68(6) (2013) 360-364.

DOI: 10.1016/j.scriptamat.2012.07.037

[15] S. Gourdet, F. Montheillet, A model of continuous dynamic recrystallization; J. Acta Mater. 51 (2003) 2685.

DOI: 10.1016/s1359-6454(03)00078-8

[16] J P. Thomas, E. Bauchet, C. Dumont and F. Montheillet, EBSD Investigation and modeling of the microstructural evolutions of superalloy 718 during hot deformation, TMS (The Minerals, Metals & Materials Society). (2004) 959-968.

DOI: 10.7449/2004/superalloys_2004_959_968

[17] T. B. Tian, Evolution of microstructures during dynamic recrystallization and dynamic recovery in hot deformed Nimonic 80a; J. Mater. Sci. Eng. A. 367 (2004) 198-204.

DOI: 10.1016/j.msea.2003.10.226

[18] S. De la Chapelle, O. Castelnau, V Y. Lipenkov and P. Duval, Dynamic recrystallization and texture development in ice as revealed by the study of deep ice cores in Antarctica and Greenland. J. Geophysical Research. 103(B3) (1998) 5091-5105.

DOI: 10.1029/97jb02621