Tension/Compression Anisotropy in Hot Forged Mg-Al-Ca-RE Alloy

Hakamada, Masataka; Watazu, Akira; Saito, Naobumi; Iwasaki, Hajime

doi:10.2320/matertrans.m2009083

Cited by 7 publications

(4 citation statements)

References 21 publications

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“…A die-cast AXE622 (Mg-Al-Ca-RE) alloy was also examined by the same authors [114]. The homogenized material (410 • C for 108 h) was deformed by compression (300 • C with 0.1 s −1 up to 1.6 true strain), followed by an analysis of the evolving microstructure and the mechanical properties.…”

Section: Mg-al-ca-systemmentioning

confidence: 99%

Mg-Alloys for Forging Applications—A Review

et al. 2020

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Interest in magnesium alloys and their applications has risen in recent years. This trend is mainly evident in casting applications, but wrought alloys are also increasingly coming into focus. Among the most common forming processes, forging is a promising candidate for the industrial production of magnesium wrought products. This review is intended to give a general introduction into the forging of magnesium alloys and to help in the practical realization of forged products. The basics of magnesium forging practice are described and possible problems as well as material properties are discussed. Several alloy systems containing aluminum, zinc or rare earth elements as well as biodegradable alloys are evaluated. Overall, the focus of the review is on the process control and processing parameters, from stock material to finished parts. A discussion of the mechanical properties is included. These data have been comprehensively reviewed and are listed for a variety of magnesium forging alloys.

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Section: Mg-al-ca-systemmentioning

confidence: 99%

Mg-Alloys for Forging Applications—A Review

et al. 2020

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“…However, in UFG E675 alloy both tensile and compression test values are similar (TYS: 521 MPa, CYS: 522 MPa). Figure 2(C) shows the yield asymmetry of various Mg alloys processed by different techniques in comparison with UFG E675 alloy [7,[16][17][18][19]. The ratio of CYS to TYS was selected as a measure of yield asymmetry in the present work.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Achieving extraordinary structural efficiency in a wrought magnesium rare earth alloy

Panigrahi

Mishra

Brennan

et al. 2020

Materials Research Letters

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The opportunities for wrought magnesium products in a wide range of structural and functional materials for transportation, energy generation, energy storage and propulsion are increasing due to their light-weighting benefits, high specific strength and ease of recyclability. However, the current uses of wrought magnesium alloys for structural applications are limited due to comparatively low strength, high yield strength asymmetry and poor formability & superplasticity. In the present work, we developed an ultrafine-grained magnesium alloy with an extraordinary strength and ductility combination, exceptional high specific strength, zero yield strength asymmetry and excellent high strain rate superplasticity. IMPACT STATEMENTWe have developed friction stir processed UFG microstructure in a rare-earth containing magnesium alloy and achieved exceptional strength-ductility combination along with no yield asymmetry and extraordinary high strain rate superplasticity.

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“…While in case of a random or weak texture (e.g. in case of die-cast alloy), mostly small differences in the mechanical behaviour between tension and compression are observed (Hakamada et al, 2009). Some authors regard tensile and compressive behaviour of cast alloys as equal, although a simple geometrical argument (Agnew et al, 2001;Mann et al, 2007) reveals that, in a randomly oriented polycrystalline aggregate, twinning in compression is more likely than in tension.…”

Section: Introductionmentioning

confidence: 99%

Mechanism-based modelling of plastic deformation in magnesium alloys

Steglich

Tian

Besson

2016

European Journal of Mechanics - A/Solids

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International audienceThe plastic deformation of two different rolled magnesium sheets (AZ31 and ZE10) under quasi-static tensile and compressive loading conditions at room temperature is studied. Beside glide by dislocation motion, deformation twinning leads to evolving flow stress asymmetry and evolving plastic anisotropy in these alloys. These mechanisms cause a significant change in the shape of the yield surface with accumulated plastic deformation which cannot be described by traditional hardening concepts. A phenomenological plasticity model in which the primary deformation mechanisms, slip and (extension) twinning, are treated separately is developed here and incorporated in the finite element framework. Deformations caused by these mechanisms are modelled by a symmetric and an asymmetric plastic potential, respectively. The hardening functions are coupled to account for the latent hardening. The necessary input for model parameter calibration is provided by mechanical tests along different orientations of the rolled sheets. Tensile tests of notched samples and shear tests are furthermore incorporated in the parameter optimisation strategy, which is based on minimising the difference between experimental behaviour and FE prediction over the entire deformation range up to failure. The model accounts for the characteristic tension-compression asymmetry and the evolution of strain anisotropy. Both, the convex-up and the concave-down shaped stress–strain response are predicted. The computational model is exemplified by studying the evolution of the plastic multipliers during a shear test. It is shown that despite its phenomenological character, the model predicts the dominant deformation mechanism present at monotonous loading of the magnesium sheets investigated

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Tension/Compression Anisotropy in Hot Forged Mg-Al-Ca-RE Alloy

Cited by 7 publications

References 21 publications

Mg-Alloys for Forging Applications—A Review

Mg-Alloys for Forging Applications—A Review

Achieving extraordinary structural efficiency in a wrought magnesium rare earth alloy

Mechanism-based modelling of plastic deformation in magnesium alloys

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