A generalized thermodynamically consistent distortional hardening model for Mg alloys

Shi, Baodong; Peng, Yan; Pan, Fusheng

doi:10.1016/j.ijplas.2015.06.010

Cited by 15 publications

(2 citation statements)

References 86 publications

(124 reference statements)

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“…McClelland et al [12]; Niezgoda et al [13]; Shi et al [14]; Stanford et al [15]; Steglich et al [16]; Wang and Choo [17]; Wen et al [18]; Wu et al [19]; Xin et al [20]). In Mg alloys, the most commonly observed twinning mode is the   1 1 10 } 2 1 10 { extension twinning.…”

Section: Introductionmentioning

confidence: 99%

On the rapid hardening and exhaustion of twinning in magnesium alloy

Guo

Qiao

et al. 2017

Acta Materialia

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We numerically study the rapid hardening and possible role of exhaustion of twinning in magnesium alloys under twinning dominated conditions, based on the large strain elastic visco-plastic self-consistent model. It is found that upon the exhaustion of the tensile twinning, further deformation requires the material to activate Prismatic and Pyramidal slips, which have relative high critical resolved shear stress (CRSS). However, the stress level at the exhaustion of the tensile twinning is not high enough to activate Prismatic and Pyramidal slips. Consequently, the imposed strain increments must mainly be accommodated by elastic deformations, and the strain hardening rate becomes a large fraction of the elastic modulus. Therefore, it can be concluded that the rapid hardening is a composite response more associated with elasticity of a large volume fraction of the material, than the dislocation-dislocation interactions normally held responsible for strain hardening of metals.

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Section: Introductionmentioning

confidence: 99%

On the rapid hardening and exhaustion of twinning in magnesium alloy

Guo

Qiao

et al. 2017

Acta Materialia

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“…In the modeling aspect of Mg and its alloys, many mechanics models are proposed such as a selfconsistent model with a local thermoelasto-viscoplastic behavior based on translated field techniques 15 (Mareau and Berbenni, 2014), a stochastic crystal plasticity model combining a Monte Carlo method with a continuum dislocation dynamics model (Askari et al, 2015), a multi-level constitutive model considering a combination of elasticity, slip and deformation twinning, derived by a two level homogenization scheme (Ardeljan et al, 2016), a generalized distortional hardening continuum model by assuming each part of dissipation non-negative (Shi et al, 2015), the crystal plasticity model for investigating the underlying de-20 formation mechanism upon two-step loading, focusing especially on the effect of twinning and detwinning activities (Hama et al, 2016), and the elastoplastic self-consistent (EPSC) polycrystal plasticity model, including a recently developed twinning-detwinning model for rare earth element containing Mg alloys at quasi-static and dynamic strain rates (Bhattacharyya et al, 2016).…”

Section: Introductionmentioning

confidence: 99%