Reorientation and stress relaxation due to twinning: Modeling and experimental characterization for Mg

Clausen, B.; Tomé, Carlos N.; Brown, Donald W.; Agnew, Sean R.

doi:10.1016/j.actamat.2008.01.057

Cited by 435 publications

(274 citation statements)

References 23 publications

Supporting

Mentioning

257

Contrasting

Unclassified

Order By: Relevance

“…While in the original EPSC model [22] twinning is treated as a directional slip mechanism, the present study utilises the "twinning scheme" which has been incorporated into the EPSC model by Clausen et al [29]. This scheme accounts for: (i) the volume effect of twinning on texture evolution and, (ii) the stress relaxation associated with the twin formation.…”

Section: Elasto-plastic Self-consistent Modellingmentioning

confidence: 99%

See 1 more Smart Citation

On the evolution and modelling of lattice strains during the cyclic loading of TWIP steel

et al. 2013

View full text Add to dashboard Cite

The evolution of lattice strains in fully annealed Fe-24Mn-3Al-2Si-1Ni-0.06C twinning-induced plasticity (TWIP) steel is investigated via in situ neutron diffraction during cyclic (tension-compression) loading between strain limits of ±1%. The pronounced Bauschinger effect observed upon load reversal is accounted for by a combination of the intergranular residual stresses and the intragranular sources of back stress, such as dislocation pile-ups at the intersection of stacking faults. The recently modified elasto-plastic self-consistent (EPSC) model which empirically accounts for both intergranular and intragranular back stresses has been successfully used to simulate the macroscopic stress-strain response and the evolution of the lattice strains. The EPSC model captures the experimentally observed tension-compression asymmetry as it accounts for the directionality of twinning as well as Schmid factor considerations. For the strain limits used in this study, the EPSC model also predicts that the lower flow stress on reverse shear loading reported in earlier Bauschinger-type experiments on TWIP steel is a geometrical or loading path effect. AbstractThe evolution of lattice strains in fully annealed Fe-24Mn-3Al-2Si-1Ni-0.06C TWinning Induced Plasticity (TWIP) steel is investigated via in-situ neutron diffraction during cyclic (tensioncompression) loading between strain limits of ±1%. The pronounced Bauschinger effect observed upon load reversal is accounted for by a combination of the intergranular residual stresses and the intragranular sources of back stress such as dislocation pile-ups at the intersection of stacking faults.The recently modified Elasto-Plastic Self-Consistent (EPSC) model which empirically accounts for both intergranular and intragranular back stresses has been successfully used to simulate the macroscopic stress-strain response and the evolution of the lattice strains. The EPSC model captures the experimentally observed tension-compression asymmetry as it accounts for the directionality of twinning as well as Schmid factor considerations. For the strain limits used in this study, the EPSC model also predicts that the lower flow stress on reverse shear loading reported in earlier Bauschinger-type experiments on TWIP steel is a geometrical or loading path effect.

show abstract

Section: Elasto-plastic Self-consistent Modellingmentioning

confidence: 99%

“…The EPSC model formulation has been detailed in previous publications [21,22,29] and only a brief description is given here. In order to initiate activity on a particular deformation system in the original EPSC model, the resolved shear stress ( :   …”

Section: Elasto-plastic Self-consistent Modellingmentioning

confidence: 99%

On the evolution and modelling of lattice strains during the cyclic loading of TWIP steel

et al. 2013

View full text Add to dashboard Cite

show abstract

“…x terms are the strain and stress "memory" parameters which are both initially set to zero during the first forward half cycle. Please refer to [3][4][5][6] for further details on the EPSC model.…”

Section: Elasto-plastic Self-consistent Modelingmentioning

confidence: 99%

“…(i) Case I utilizes the twinning scheme of Clausen et al [4] which was applied in [3], and included here for comparison with Case II. This scheme accounts for the stress relaxation associated with twin formation via the so called "finite initial fraction" approach; wherein the twin is assumed to grow to a fixed volume fraction of its parent grain at the nucleation stage.…”

Section: Elasto-plastic Self-consistent Modelingmentioning

confidence: 99%

“…of Clausen et al [4]), the potential contribution of partial slip to the overall mechanical response was not taken into account. The present study is therefore the first to assess the influence of deformation faulting or slip by partials during the cyclic loading of a TWIP steel, such that we provide a more holistic analysis of the contribution of perfect/partial slip and twinning to the overall deformation behaviour.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

On the feasibility of partial slip reversal and de-twinning during the cyclic loading of TWIP steel

et al. 2016

View full text Add to dashboard Cite

A recently modified Elasto-Plastic Self-Consistent (EPSC) model which empirically accounts for both intergranular and intragranular back stresses has been successfully used to simulate the cyclic (tensioncompression) loading behaviour of an Fe-24Mn-3Al-2Si-1Ni-0.06C TWinning Induced Plasticity (TWIP) steel between strain limits of ±1%. Lattice strain measurements acquired via in-situ neutron diffraction were used to further validate the modelling results. An improved prediction of the pronounced Bauschinger effect during unloading is achieved when the reversibility of partial slip in the 〈112〉 direction is accounted for. This result indicates a potential contribution of the stress-induced separation of partial dislocations to the observed early yielding at the low strain levels employed in this study. It also raises the possibility that detwinning events could be operative during load reversal.  direction is accounted for. This result indicates a potential contribution of the stressinduced separation of partial dislocations to the observed early yielding at the low strain levels employed in this study. It also raises the possibility that de-twinning events could be operative during load reversal.

show abstract

Plastic Deformation of Magnesium Alloy Subjected to Compression‐First Cyclic Loading

Lee¹,

Gharghouri²,

Root³

2011

Magnesium Technology 2011

View full text Add to dashboard Cite

Reorientation and stress relaxation due to twinning: Modeling and experimental characterization for Mg

Cited by 435 publications

References 23 publications

On the evolution and modelling of lattice strains during the cyclic loading of TWIP steel

On the evolution and modelling of lattice strains during the cyclic loading of TWIP steel

On the feasibility of partial slip reversal and de-twinning during the cyclic loading of TWIP steel

Plastic Deformation of Magnesium Alloy Subjected to Compression‐First Cyclic Loading

Contact Info

Product

Resources

About