Mechanical behavior and microstructural evolution of a Mg AZ31 sheet at dynamic strain rates

Ulacia, I.; Dudamell, N.V.; Gálvez, Francisco; Yi, Sangbong; Pérez‐Prado, M.T.; Hurtado, I.

doi:10.1016/j.actamat.2010.01.029

Cited by 303 publications

(179 citation statements)

References 34 publications

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“…Non-basal slip systems are also active, albeit to a lesser extent (Koike et al, 2003;Agnew and Duygulu, 2005;Keshavarz and Barnett, 2006). The activity of different deformation modes is highly dependent on temperature, initial texture and strain rate (Gehrmann et al, 2005;Al-Samman and Gottstein, 2008;Ulacia et al, 2010;Khan et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Continuum modeling of the response of a Mg alloy AZ31 rolled sheet during uniaxial deformation

Fernández

Prado

Wei

et al. 2011

International Journal of Plasticity

101

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a b s t r a c tLightweight magnesium alloys, such as AZ31, constitute alternative materials of interest for many industrial sectors such as the transport industry. For instance, reducing vehicle weight and thus fuel consumption can actively benefit the global efforts of the current environmental industry policies. To this end, several research groups are focusing their experimental efforts on the development of advanced Mg alloys. However, comparatively little computational work has been oriented towards the simulation of the micromechanisms underlying the deformation of these metals. Among them, the model developed by Staroselsky and Anand [Staroselsky, A., Anand, L., 2003. A constitutive model for HCP materials deforming by slip and twinning: application to magnesium alloy AZ31B. International Journal of Plasticity 19 (10), 1843-1864] successfully captured some of the intrinsic features of deformation in Magnesium alloys. Nevertheless, some deformation micromechanisms, such as cross-hardening between slip and twin systems, have been either simplified or disregarded. In this work, we propose the development of a crystal plasticity continuum model aimed at fully describing the intrinsic deformation mechanisms between slip and twin systems. In order to calibrate and validate the proposed model, an experimental campaign consisting of a set of quasi-static compression tests at room temperature along the rolling and normal directions of a polycrystalline AZ31 rolled sheet, as well as an analysis of the crystallographic texture at different stages of deformation, has been carried out. The model is then exploited by investigating stress and strain fields, texture evolution, and slip and twin activities during deformation. The flexibility of the overall model is ultimately demonstrated by casting light on an experimental controversy on the role of the pyramidal slip hc + ai versus compression twinning in the late stage of polycrystalline deformation, and a failure criterion related to basal slip activity is proposed.

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Section: Introductionmentioning

confidence: 99%

Continuum modeling of the response of a Mg alloy AZ31 rolled sheet during uniaxial deformation

Fernández

Prado

Wei

et al. 2011

International Journal of Plasticity

101

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“…It is known that the CRSS of nonbasal systems decreases more slowly with temperature than under quasi-static conditions [5] and, thus, twinning is operative even at T>400°C [5,[30][31][32][33]. Therefore strongly textured Mg alloys remain mechanically anisotropic at such high temperatures [5]. Dynamically recrystallized grains have been observed in Mg alloys, such as AZ91 andAZ31, after impact loading at high temperatures [30][31][32].…”

Section: Introductionmentioning

confidence: 91%

“…Depending on the material composition and microstructural characteristics, DDRX and CDRX may coexist in wide Z ranges. The high temperature deformation and recrystallization mechanisms of Mg alloys at impact strain rates (~10 3 s _1 ) are currently not well understood, as significantly fewer studies have been carried out in this area [5,[30][31][32][33][34][35][36]. It is known that the CRSS of nonbasal systems decreases more slowly with temperature than under quasi-static conditions [5] and, thus, twinning is operative even at T>400°C [5,[30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

“…These values are of the order of 5 MPa for basal slip, lOMPa for extension twinning, 20 MPa for prismatic slip, 40 MPa for pyramidal slip and 70-80 MPa for contraction twinning. Thus, in the highly textured alloys resulting from conventional rolling or extrusion processes the predominant mechanisms will depend strongly on the loading mode (tension or compression) as well as on the loading direction with respect to the c-axes of the polycrystalline aggregate [4][5][6]8]. In summary, the mechanical behavior and the microstructural evolution during room temperature quasi-static deformation of strongly textured Mg alloys is highly anisotropic.…”

Section: Introductionmentioning

confidence: 99%

“…The deformation mechanisms predominant in Mg alloys at low temperatures and low strain rates are now known rather well and have been reviewed in several occasions [4][5][6]. Possible deformation modes include basal ((0 0 01){a>), prismatic ({10-10}(a>) and pyramidal ({10-11 }(a> and {11-22}(c + a>) slip, as well as {10-12} extension and {10-11} and {10-13} contraction twinning.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of texture on the recrystallization mechanisms in an AZ31 Mg sheet alloy at dynamic rates

Dudamell

Ulacia

Gálvez

et al. 2011

Materials Science and Engineering: A

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An AZ31 rolled sheet alloy has been tested at dynamic strain rates (e~10 3 s _1 ) at 250°C up to various intermediate strains before failure in order to investigate the predominant deformation and restoration mechanisms. In particular, tests have been carried out in compression along the rolling direction (RD), in tension along the RD and in compression along the normal direction (ND). It has been found that dynamic recrystallization (DRX) takes place despite the limited diffusion taking place under the high strain rates investigated. The DRX mechanisms and kinetics depend on the operative deformation mechanisms and thus vary for different loading modes (tension, compression) as well as for different relative orientations between the loading axis and the c-axes of the grains. In particular, DRX is enhanced by the operation of (c + a) slip, since cross-slip and climb take place more readily than for other slip systems, and thus the formation of high angle boundaries is easier. DRX is also clearly promoted by twinning.

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Dynamic Behaviour of a Rare Earth Containing Mg Alloy, WE43B‐T5, Plate with Comparison to Conventional Alloy, AM30‐F

Agnew

Wittington

Oppedal

et al. 2014

Magnesium Technology 2014

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Mechanical behavior and microstructural evolution of a Mg AZ31 sheet at dynamic strain rates

Cited by 303 publications

References 34 publications

Continuum modeling of the response of a Mg alloy AZ31 rolled sheet during uniaxial deformation

Continuum modeling of the response of a Mg alloy AZ31 rolled sheet during uniaxial deformation

Influence of texture on the recrystallization mechanisms in an AZ31 Mg sheet alloy at dynamic rates

Dynamic Behaviour of a Rare Earth Containing Mg Alloy, WE43B‐T5, Plate with Comparison to Conventional Alloy, AM30‐F

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