Modeling of Grain-Boundary Mobility and Nucleation Rate during Discontinuous Dynamic Recrystallization in Ni-Nb Alloys and a High-Purity Alloy Derived from SAE 304L

David Piot; Guillaume Smagghe; Frank Montheillet

doi:10.4028/www.scientific.net/MSF.879.1501

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HomeMaterials Science ForumMaterials Science Forum Vol. 879Modeling of Grain-Boundary Mobility and Nucleation...

Modeling of Grain-Boundary Mobility and Nucleation Rate during Discontinuous Dynamic Recrystallization in Ni-Nb Alloys and a High-Purity Alloy Derived from SAE 304L

Abstract:

A simple mesoscale model has been developed for discontinuous dynamic recrystallization. Each grain is considered in turn as an inclusion, embedded in a homogeneous equivalent matrix, the properties of which are obtained by averaging over all the grains. The model includes: (i) a grain-boundary migration-equation driving the evolution of grain size via the mobility of grain boundaries, which is coupled with (ii) a single-internal-variable (dislocation density) constitutive model for strain hardening and dynamic recovery, and (iii) a nucleation equation governing the total number of grains by the nucleation of new grains. All the system variables tend to asymptotic values at large strains, in agreement with the experimentally observed steady-state regime.With some assumptions, both steady-state stress and grain-size are derived in closed forms, allowing immediate identification of the mobility of grain boundaries and the rate of nucleation. An application to Ni–Nb-pure-binary model alloys and high-purity 304L stainless steel with Nb addition is presented. More specifically on one hand, from experimental steady-state stresses and grain sizes, variations of the grain boundary mobility and the nucleation rate with niobium content are addressed in order to quantify the solute-drag effect of niobium in nickel. And on the other hand, the Derby exponents were investigated varying separately the strain rate or the temperature.

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Periodical:

Materials Science Forum (Volume 879)

Pages:

1501-1506

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.879.1501

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Online since:

November 2016

Authors:

David Piot*, Guillaume Smagghe, Frank Montheillet

Keywords:

Aerospace Applications, Dynamic Recrystallization, Grain Boundary Mobility, Modeling, Nickel-Niobium Alloys (Ni-Nb), Nucleation Rate, Stainless Steel, Superalloy

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References

[1] G. Damamme, D. Piot, F. Montheillet, S.L. Semiatin, A Model of Discontinuous Dynamic Recrystallization and Its Application for Nickel Alloys, Mater. Sci. Forum 638–642 (2010) 2543–2548 (Thermec'2009 Berlin).

DOI: 10.4028/www.scientific.net/msf.638-642.2543

Google Scholar

[2] D. Piot, G. Damamme, F. Montheillet, Mesoscopic Modeling of Discontinuous Dynamic Recrystallization: Steady-state Grain Size Distributions, Mater. Sci. Forum 706–709 (2012) 234–239 (Thermec'2011 Québec).

DOI: 10.4028/www.scientific.net/msf.706-709.234

Google Scholar

[3] F. Montheillet, O. Lurdos, G. Damamme, A grain scale approach for modeling steady-state discontinuous dynamic recrystallization, Acta Mater. 57 (2009) 1602–1612.

DOI: 10.1016/j.actamat.2008.11.044

Google Scholar

[4] F. Montheillet, J.J. Jonas, Models of Recrystallization, in: D.U. Furrer, S.L. Semiatin (Eds. ), ASM Handbook, vol. 22A: Fundamentals of Modeling for Metals Processing, ASM International, 2009, p.220–231.

DOI: 10.31399/asm.hb.v22a.a0005403

Google Scholar

[5] F. Montheillet, D. Piot, N. Matougui, M.L. Fares, A Critical Assessment of Three Usual Equations for Strain Hardening and Dynamic Recovery, Metall. Mater. Trans. A 45 (2014) 4324–4332.

DOI: 10.1007/s11661-014-2388-9

Google Scholar

[6] D. Piot, F. Montheillet, S.L. Semiatin, Rheological Behavior of Pure Binary Ni–Nb Model Alloys, Mater. Sci. Forum 638–642 (2010) 2700–2705 (Thermec'2009 Berlin).

DOI: 10.4028/www.scientific.net/msf.638-642.2700

Google Scholar

[7] N. Matougui, D. Piot, M.L. Fares, F. Montheillet, S.L. Semiatin, Influence of niobium solutes on the mechanical behavior of nickel during hot deformation, Mater. Sci. & Eng. A 586 (2013) 350–357.

Google Scholar

[8] J.W. Cahn, The Impurity-Drag Effect in Grain Boundary Motion, Acta Metall. 10 (1962) 789–798.

DOI: 10.1016/0001-6160(62)90092-5

Google Scholar

[9] B. Derby, The dependence of grain size on stress during dynamic recrystallization, Acta Metall. Mater. 39 (1991) 955–962.

DOI: 10.1016/0956-7151(91)90295-c

Google Scholar