Study of the loading mode dependence of the twinning in random textured cast magnesium by acoustic emission and neutron diffraction methods

Čapek, Jan; Máthis, Kristián; Clausen, B.; Stráská, Jitka; Béran, P.; Lukáš, P.

doi:10.1016/j.msea.2014.02.051

Cited by 81 publications

(45 citation statements)

References 36 publications

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“…the larger twinned volume fraction) is observed for the best oriented grains and the twinning rate monotonically decreases with decreasing TwSF. In agreement with our previous work [12], we found twins also in unfavorable oriented grains, as it is presented in Fig. 4b.…”

Section: Resultssupporting

confidence: 94%

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Twinning Evolution as a Function of Loading Direction in Magnesium

et al. 2015

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The twinning activity in random textured cast magnesium during monotonic, room temperature tension and compression tests was monitored by neutron diraction. Decrease of integrated intensity which characterizes the twinned volume fraction of selected reections was compared to its Schmid factor. The comparison shows that twinned fraction correlates with the maximum value of the Schmid factor with high precision during tensile test and with the average value of the Schmid factor during compression test.

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Section: Resultssupporting

confidence: 94%

“…As it was shown in our concurrent paper [12], there is a signicant dierence between the compression and tension case. In compression, if the c-axis of a particular grain is deviated from the ideal orientation (i.e.…”

Section: Resultssupporting

confidence: 68%

Twinning Evolution as a Function of Loading Direction in Magnesium

et al. 2015

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“…This eect can be explained by the dierence in twin growth between tension and compression. As it was shown in our recent work [20], in compression a rapid growth of nucle- Fig. 2.…”

Section: Resultssupporting

confidence: 66%

Effect of Loading Mode on the Evolution of the Dislocation Structure in Magnesium

et al. 2015

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The evolution of the dislocation structure in randomly textured cast magnesium as a function of loading mode is studied using whole neutron diraction pattern line prole analysis and elasto-plastic self-consistent modeling. Both the experimental results and the theoretical data indicate the onset of basal slip at low stresses and the key role of prismatic slip in the macroscopic yield. Dependence of the second-order pyramidal slip on the loading mode is revealed.

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“…De-twinning is associated with twin shrinkage. Due to the polar nature, the twinning/de-twinning behavior exhibits pronounced asymmetry with respect to the direction of loading [8,9,20,21]. Paired with the asymmetry of tension-compression behavior of twinning, this brings significant complexity to the overall cyclic response of Mg alloys.…”

Section: Introductionmentioning

confidence: 99%

Evolution of Mechanical Twinning during Cyclic Deformation of Mg-Zn-Ca Alloys

Vinogradov

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Linderov

et al. 2016

Metals

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Abstract:The present study clarifies the complex interplay between mechanical twinning and dislocation slip during low-cycle fatigue testing of Mg-Zn-Ca alloys. Temporal details of these mechanisms are studied non-destructively by in situ monitoring of the acoustic emission (AE) response powered by a robust signal categorization. Through the analysis of AE time series, the kinetics of deformation twinning per cycle and the overall accumulation of twinning during cyclic loading is described and its effect on fatigue life is highlighted.

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Study of the loading mode dependence of the twinning in random textured cast magnesium by acoustic emission and neutron diffraction methods

Cited by 81 publications

References 36 publications

Twinning Evolution as a Function of Loading Direction in Magnesium

Twinning Evolution as a Function of Loading Direction in Magnesium

Effect of Loading Mode on the Evolution of the Dislocation Structure in Magnesium

Evolution of Mechanical Twinning during Cyclic Deformation of Mg-Zn-Ca Alloys

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