A “universal” temperature scale for plastic flow

Mecking, H.; Nicklas, B.; Zárubová, N.; Kocks, U.F.

doi:10.1016/0001-6160(86)90088-x

Cited by 111 publications

(40 citation statements)

References 21 publications

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“…Another approach is the reaction-diffusion modeling of dislocation density evolution, proposed in [56]. The saturation level of the macroscopic flow stress at steady state is in [61,52] observed to satisfy a proportionality according to…”

Section: Modeling Of Polycrystal Plasticity and Heterogeneous Dislocamentioning

confidence: 99%

A modified level set approach to 2D modeling of dynamic recrystallization

Hallberg

2013

Modelling Simul. Mater. Sci. Eng.

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The macroscopic properties of metallic materials depend on the state of the grain microstructure. Recrystallization acts as one of the most important mechanisms in the evolution of the microstructure and hence also of the macroscopic properties. This paper presents a mesoscale model of microstructure evolution due to recrystallization, based on a level set formulation employed in a finite element setting. The use of level sets to represent grains and grain boundaries in polycrystal microstructures is a relatively recent development in computational materials science and the present contribution suggests new methodologies such as interface reconstruction, allowing for example boundary conditions to be prescribed along grain boundary interfaces and distinct localization and representation of grain boundary junctions. Polycrystal plasticity is modeled by considering the evolution of dislocation density in the individual crystals. The influence of grain boundaries on dislocation accumulation is captured in the model, causing the formation of dislocation density gradients within the grains. The model is used in simulations of dynamic recrystallization, taking pure copper as example material. It is shown that the proposed model captures the salient features of dynamic recrystallization during thermomechanical materials processing.

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Section: Modeling Of Polycrystal Plasticity and Heterogeneous Dislocamentioning

confidence: 99%

A modified level set approach to 2D modeling of dynamic recrystallization

Hallberg

2013

Modelling Simul. Mater. Sci. Eng.

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“…Nix and Ilschner [3] believe that recovery and thermally activated glide should be localized in hard and soft zones respectively ; -transition towards recovery which is controlled by alternative processes, such as pipe diffusion [7,53,54] (however, n only increases by 2) and cross slip [55]. 5 [10,56,57] that the controlling mechanism cannot be diffusion, while another investigation [8] claims that the mechanism should be the climb of jogs on screw dislocations (however between 0.5 and 0.9 Tm only). [3] claim that recovery takes place in the hard zones (subboundaries) under stresses larger than the applied stress.…”

Section: 22mentioning

confidence: 99%

New trends in creep microstructural models for pure metals

Caillard

Martin

1987

Rev. Phys. Appl. (Paris)

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“…15) Figure 6 indicates that the work hardening rate (ds/de) follows the lineal relationship with stress that is associated with Stage III deformation in single crystals and polycrystal alloys. [16][17][18][19] Such behaviour is maintained from yield (s o ) up to saturation (s s ), but, as straining progresses beyond the maximum value of stress, the strength of the material diminishes. The amount of reduction in strength beyond the maximum value increases as the strength of the material increases as in Fig.…”

Section: Resultsmentioning

confidence: 99%