Theoretical study on the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mrow><mml:mrow><mml:mo>{</mml:mo><mml:mrow><mml:mrow><mml:mover accent="true"><mml:mn>1</mml:mn><mml:mo>¯</mml:mo></mml:mover></mml:mrow><mml:mn>012</mml:mn></mml:mrow><mml:mo>}</mml:mo></mml:mrow></mml:mrow></mml:math>deformation twinning and cracking in coarse-grained magnesium alloys

Xie, Chao; Fang, Qihong; Liu, X.; Guo, Pengcheng; Chen, J.K.; Zhang, M.H.; Liu, Y.W.; Rolfe, Bernard; Li, L.X.

doi:10.1016/j.ijplas.2016.02.001

Cited by 41 publications

(2 citation statements)

References 76 publications

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“…Similarly, the toughening effect resulting from nanoscale twinning is also controlled by the twin thickness, and an optimum twin size can optimize the toughening effect. Furthermore, concerning the twin lath with a length in several sub-micrometers [18], and a thickness in several nanometers, the toughening effect increases with the increment of thickness–length ratio [45].…”

Section: Resultsmentioning

confidence: 99%

Crack interaction with nanoscale twinning near a second-phase particle in fine-grained magnesium alloy

Feng

Chen

2018

Mathematics and Mechanics of Solids

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A theoretical model is established to address the effect of nanoscale twinning near a second-phase particle on crack growth in fine-grained magnesium alloys. The numerical solutions of singular integral equations are obtained by the considering complex variable method of Muskhelishvili, the superposition principle of elasticity, and the distributed dislocation technique. The expressions of stress intensity factors near the left crack tip are derived, and the energy release rate (ERR) characterizing the condition for crack propagation is also calculated. The influences of relevant parameters such as the location of nanoscale twin, the size of particle, and the relative distance between the inhomogeneity and the left crack tip on the ERR are examined in detail. The results indicate that the ERR is strongly influenced by the nanoscale twinning and the second-phase particle. The hard inhomogeneity decreases the ERR while the soft inhomogeneity increases the ERR when nanoscale twinning is not taken into account. At the same time, there is competition between the effects of the hard particle and nanoscale twinning on the ERR, and the nanoscale twin band with an optimum size displays the best toughening effect.

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Section: Resultsmentioning

confidence: 99%

Crack interaction with nanoscale twinning near a second-phase particle in fine-grained magnesium alloy

Feng

Chen

2018

Mathematics and Mechanics of Solids

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“…As a consequence of the polarity of twinning, rolled hexagonal metal plates exhibit a characteristic texture [30]; the flow stress evolution shows a strong anisotropy between the in-plane and through-thickness directions [31,32]; and aggregated twinning shows an increase in hardening rate and a continuous evolution of grain microstructure with deformation [33,34]. In particular, during cyclic loading or strain-path changes, a twin interacts with another twin, resulting in the formation of twin-twin junctions that influence subsequent plastic deformation modes, slips, twinning, secondary twinning, and de-twinning [35][36][37][38]. Thus, there is also an urgent demand for the development of predictive capabilities that can describe twinning and twinning-induced sequential events, and their correlations with microstructures, temperatures, and loading conditions [5,6].…”

Section: Introductionmentioning

confidence: 99%

Sequential {101¯2} twinning stimulated by other twins in titanium

Gong

Lecomte

et al. 2017

Acta Materialia

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We experimentally studied sequential {10 2} twinning in rolled pure titanium at room temperature and identified a new sequential twinning mechanism, i.e., {10 2} () extension twin stimulated by the twin-twin junction of two primary {11 } extension twins and , which holds a certain relation . Schmid factor analysis, as the local stress is taken into account, is able to determine the position of sequential twin variant, but cannot determine the twin variant. Displacement gradient accommodation is used to determine the twin variant. The well-known secondary {10 2} () extension twins in primary {11 2} () contraction twins (referred to as  double twinning) are also analyzed according to a generalized Schmid factor analysis. Displacement gradient accommodation and twin nucleation based on dislocations dissociation only work well for the most active twin variants, but cannot address other phenomena associated with  double twinning. For rarely activated twin variants, displacement gradient accommodation was not satisfied.

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Effect of Aluminum and Grain Size on the Fracture Behavior of Twinning-Induced Plasticity Steels

Luo

Huang

2018

Metall Mater Trans B

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Theoretical study on the{1¯012}deformation twinning and cracking in coarse-grained magnesium alloys

Cited by 41 publications

References 76 publications

Crack interaction with nanoscale twinning near a second-phase particle in fine-grained magnesium alloy

Crack interaction with nanoscale twinning near a second-phase particle in fine-grained magnesium alloy

Sequential {101¯2} twinning stimulated by other twins in titanium

Effect of Aluminum and Grain Size on the Fracture Behavior of Twinning-Induced Plasticity Steels

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