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

Saleh, Ahmed A.; Pereloma, Elena V.; Clausen, B.; Brown, Donald W.; Tomé, Carlos N.; Gazder, Azdiar A.

doi:10.1016/j.actamat.2013.05.017

Cited by 41 publications

(35 citation statements)

References 57 publications

(93 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As seen in Fig. 1c and detailed in [3], tension-compression asymmetry is expected in materials that deform by twinning due to their inherently lower yield stress in uniaxial tension compared to compression [15]. Here Case I captures the asymmetric behaviour between tension and compression as it accounts for both, the irreversibility of twinning and Schmid factor considerations wherein not all the twinning systems activated during tension are activated during compression [15].…”

Section: Resultsmentioning

confidence: 99%

“…In the EPSC model [5], the elastic response of the individual grains is described by the single crystal elastic constants (C11 = 161.5 GPa, C12 = 110.3 GPa and C44 = 133.3 GPa) [3], whereas the plastic response is described by activating the various deformation systems (s) at predetermined values of the critical resolved shear stress (CRSS). The CRSS evolves with the total accumulated shear strain ( …”

Section: Elasto-plastic Self-consistent Modelingmentioning

confidence: 99%

“…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%

“…This low SFE also facilitates the dissociation of perfect dislocations gliding on the {111} plane in the 110  direction into 112  Shockley partials ( While the modelling of the monotonic deformation behaviour of TWIP steel has been the focus of numerous studies (see [1,2] and the references therein), the modelling of its cyclic (reverse) loading remains very limited. In this regard, we recently applied a combination of in-situ neutron diffraction and a modified Elasto-Plastic Self-Consistent (EPSC) modelling scheme to a TWIP steel subjected to cyclic (tension-compression) loading [3]. A pronounced Bauschinger effect was observed upon load reversal (or early yielding during unloading) and was attributed to a combination of intergranular residual stresses and intragranular sources of back stress such as dislocation pile-ups at the intersection of stacking faults.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

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

et al. 2016

Self Cite

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

Section: Resultsmentioning

confidence: 99%

Section: Elasto-plastic Self-consistent Modelingmentioning

confidence: 99%

Section: Elasto-plastic Self-consistent Modelingmentioning

confidence: 99%

Section: Elasto-plastic Self-consistent Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

et al. 2016

Self Cite

View full text Add to dashboard Cite

show abstract

Mechanical Behavior of High-Entropy Alloys: A Review

Shang

Brechtl

Pistidda

et al. 2021

High-Entropy Materials: Theory, Experiments, and Applications

View full text Add to dashboard Cite

High-entropy alloys (HEAs) are materials that consist of equimolar or nearequimolar multiple principal components but tend to form single phases, which is a new research topic in the field of metallurgy, have attracted extensive attention in the past decade. The HEAs families contain the face-centered-cubic (fcc), body-centered-cubic (bcc), and hexagonal-close-packed (hcp)-structured HEAs. On one hand, mechanical properties, e.g. hardness, strength, ductility, fatigue, and elastic moduli, are essential for practical applications of HEAs. Scientists have explored in this direction since the advent of HEAs. On the other hand, the pursuit of high strength and good plasticity is the critical research issue of materials. Hence, strengthening of HEAs is a crucial issue. Recently, many articles are focusing on the strengthening strategies of HEAs [1][2][3][4][5][6][7][8][9][10][11][12][13][14].In this chapter, we reviewed the recent work on the room-temperature elastic properties and mechanical behavior of HEAs, including the mechanisms behind the plastic deformation of HEAs at both low and high temperatures. Furthermore, the present work examined the strengthening strategies of HEAs, e.g. strain hardening, grain-boundary strengthening, solid-solution strengthening, and particle strengthening. The fatigue, creep, and fracture properties were briefly introduced. Lastly, the future scientific issues and challenges of HEAs were discussed.

show abstract

Impact of hardening law on the FEM prediction of residual stresses in copper-clad aluminum wires

Dashti

Keller

Vieille

et al. 2023

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Near-surface axial tensile residual stresses (from manufacturing) are reportedly detrimental to the yield strength of cold-drawn wires. Therefore, a reliable evaluation of their magnitude is necessary. The size and geometry of electrical wires can pose challenges for experimental measurement of those residual stresses. For that reason, the nite element analysis can prove useful. However, great care must be taken with the right choice of strain hardening law for a sound assessment of residual stresses. Given the complex loading condition during cold drawing, cyclic loading arises through the wire cross section even in single-pass drawing. As a result, it is of crucial importance to account for associated backstresses. The current study makes a comparison between two different hardening laws' prediction of axial residual stress pro les in numerically cold-drawn Cu-Al composite wires of various Al volume fractions. The impact of die geometry on this prediction was also examined for a 25%Al-wire. To that end, a combined isotropic-kinematic law and a pure isotropic constitutive equation were considered. The results imply a possible overestimation of residual stresses by the pure isotropic model at relatively low Al volume fractions. The difference between the maximum magnitudes of tensile or compressive residual stresses (predicted by the two models) could be as large as about 100 MPa (larger than the yield strength of the starting materials). Furthermore, the tooling geometry minimally affects the prediction of the hardening models. In conclusion, backstresses are not to be overlooked for accurate estimations of drawing residual stresses at low Al volume fractions.

show abstract

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

Cited by 41 publications

References 57 publications

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

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

Mechanical Behavior of High-Entropy Alloys: A Review

Impact of hardening law on the FEM prediction of residual stresses in copper-clad aluminum wires

Contact Info

Product

Resources

About