Incorporating latent hardening in visco-plastic self-consistent framework for performing texture simulations

Though Kro¨ner’s self-consistent model is not fully consistent in the elastic-plastic deformation of polycrystals, it is found to be perfectly consistent in the time-dependent deformation of such materials. Hill’s model, on the other hand, should be used with a modified constraint tensor containing the elastic moduli of the matrix in that case. Kro¨ner’s model is supplemented with a physically consistent constitutive equation for the slip system; these, together with Weng’s inverse method, form the basis of a self-consistent determination of time-dependent behavior of metals. The kinematic component of the latent hardening law and the residual stress introduced in more favorably oriented grains are the two major driving forces for recovery and the Bauschinger effect in creep. The proposed method was applied to predict the creep and recovery strains of a 2618-T61 Aluminum alloy under pure shear, step and nonradial loading. The predicted results are seen to be in generally good agreement with the test data.

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Self-Consistent Modelling of TWIP Steel during Uniaxial Tensile Loading

Materials Science Forum ◽

10.4028/www.scientific.net/msf.783-786.732 ◽

2014 ◽

Vol 783-786 ◽

pp. 732-737

Author(s):

Ahmed A. Saleh ◽

Elena V. Pereloma ◽

Azdiar A. Gazder

Keyword(s):

Twip Steel ◽

Texture Evolution ◽

Dominant Role ◽

Tensile Loading ◽

Uniaxial Tensile ◽

X Ray Diffraction ◽

Grain Interaction ◽

Self Consistent ◽

Interaction Scheme ◽

Latent Hardening

The Visco-Plastic (VPSC) and Elasto-Plastic (EPSC) Self-Consistent models were applied to simulate the macroscopic stress-strain response and the evolution of crystallographic texture during the tensile loading of a fully annealed Fe-24Mn-3Al-2Si-1Ni-0.06C TWIP steel. Bulk texture measurements acquired by X-ray diffraction were used to validate the modelling results. Various modelling constructs were employed to assess the contribution of twinning and latent hardening to the texture evolution. The simulations revealed the dominant role of perfect slip and the limited effect of twinning on texture development as well as a possible role for latent hardening. Comparison between the texture predictions of the VPSC and EPSC models underscored the correlation between the latent hardening effects and the employed grain interaction scheme.

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Constitutive Modeling Based on Evolutionary Multi-Junctions of Dislocations

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.611-612.1771 ◽

2014 ◽

Vol 611-612 ◽

pp. 1771-1776 ◽

Cited By ~ 2

Author(s):

Minh Son Pham ◽

Anthony D. Rollett ◽

Adam Creuziger ◽

Mark Iadicola ◽

Tim Foecke

Keyword(s):

Plane Strain ◽

Yield Surface ◽

Constitutive Modeling ◽

Texture Evolution ◽

Short Term ◽

Hardening Model ◽

Plastic Model ◽

Self Consistent ◽

Latent Hardening ◽

Multiple Interactions

A latent hardening model based on binary junction-induced hardening can effectively describe the anisotropy measured in multiaxial tests. However, this approach still has some descriptive and predictive limitations. Recent findings show that binary junctions generated by interactions of pairs of dislocations can only induce short-term hardening effect due to the unzipping process of binary junctions. By contrast, multi-junctions, which are formed via multiple interactions of dislocations, can exert a strong and enduring influence on the hardening of polycrystals. In this study, we extend the modeling of dislocation junctions from the binary to multi-junctions, and implement this evolution into a self-consistent visco-plastic model. An application of this model for predicting the yield surface and texture evolution of AA5754 during uniaxial and plane strain loadings is given as a demonstration of the capabilities of the evolutionary binary-multi junction approach.

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Work Hardening and Textures in hcp Materials

Materials Science Forum ◽

10.4028/www.scientific.net/msf.495-497.1597 ◽

2005 ◽

Vol 495-497 ◽

pp. 1597-1602 ◽

Cited By ~ 1

Author(s):

P. Sánchez ◽

A. Pochettino

Keyword(s):

Work Hardening ◽

Texture Evolution ◽

The Self ◽

Prismatic Slip ◽

Viscoplastic Model ◽

Hardening Process ◽

Self Consistent ◽

Hcp Materials ◽

Latent Hardening ◽

Deformation Modes

An analysis of the hardening process in grains and its effect on texture development of hcp materials is performed. It corresponds to the cases of Zr and Zn, which present different c/a relationship and, consequently, their deformation modes and the associated activities are different. The self consistent viscoplastic model is used for the prediction of texture evolution Results show the importance of the self and latent hardening introduced by the prismatic slip in Zr and the latent hardening effects introduced by pyramidal <c+a> slip on compressive twinning in Zn.

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Latent hardening within the elasto-plastic self-consistent polycrystal homogenization to enable the prediction of anisotropy of AA6022-T4 sheets

International Journal of Plasticity ◽

10.1016/j.ijplas.2018.02.007 ◽

2018 ◽

Vol 105 ◽

pp. 141-163 ◽

Cited By ~ 37

Author(s):

Milovan Zecevic ◽

Marko Knezevic

Keyword(s):

Self Consistent ◽

Latent Hardening

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The evolution of the Kuiper belt during the formation of the outer planets

International Astronomical Union Colloquium ◽

10.1017/s0252921100031213 ◽

1999 ◽

Vol 173 ◽

pp. 37-44

Author(s):

M.D. Melita ◽

A. Brunini

Keyword(s):

Kuiper Belt ◽

Outer Planets ◽

Self Consistent ◽

Planetary Bodies ◽

Mass Depletion

AbstractA self-consistent study of the formation of planetary bodies beyond the orbit of Saturn and the evolution of Kuiper disks is carried out by means of an N-body code where accretion and gravitational encounters are considered. This investigation is focused on the aggregation of massive bodies in the outer planetary region and on the consequences of such process in the corresponding cometary belt. We study the link between the bombardment of massive bodies and mass depletion and eccentricity excitation.

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