Reducing the tension–compression yield asymmetry of extruded Mg–Zn–Ca alloy via equal channel angular pressing

Tong, L.B.; Zheng, M.Y.; Kamado, Shigeharu; Zhang, D.P.; Meng, Jian; Cheng, Liren; Zhang, H.J.

doi:10.1016/j.jma.2015.08.007

Cited by 57 publications

(7 citation statements)

References 29 publications

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“…This was attributed not only to deformation parameters – temperature and strain rate – but, more importantly, to the metallurgical parameters such as the initial crystallographic orientations that inhibited the activation of mechanical twinning and suppressed basal slip. This conclusion has been corroborated by Tong et al who have demonstrated the positive effect of ECAP on the tension–compression yield asymmetry in the Mg–5.3Zn–0.6Ca (wt%) alloy due to both grain refinement and texture variation resulting in the reduced activity of extension twinning during compression. The fine precipitates in this alloy were found to be an additional factor restricting twinning nucleation, and thus contributing to the alleviation of yield asymmetry.…”

Section: Microstructure Evolution During Spd Of Magnesium Alloyssupporting

confidence: 62%

Tailoring Microstructure and Properties of Fine Grained Magnesium Alloys by Severe Plastic Deformation

2017

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Modern wrought magnesium alloys have poor formability at room temperature, which impedes the wider uptake of these alloys by the industry. Over the last decades, research activities in the area of magnesium alloy development have grown enormously and have produced a pallet of exciting findings, which the authors summarize in this concise review focused on the effect of the microstructure, primarily of grain size, on room temperature ductility of wrought Mg-based alloys. Well-established paths and modern strategies to control over the grain size distribution are discussed. It is demonstrated that the use of severe plastic deformation techniques for ultimate grain refinement in magnesium alloys opens new windows for improving their mechanical properties profile by managing both strength and ductility in a wide range. However, it is shown that grain size alone cannot be regarded as a key parameter controlling the mechanical behavior of Mg alloys. The effect of texture is of paramount importance for the overall mechanical response of Mg alloys and this may supersede the influence of grain size.

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Section: Microstructure Evolution During Spd Of Magnesium Alloyssupporting

confidence: 62%

Tailoring Microstructure and Properties of Fine Grained Magnesium Alloys by Severe Plastic Deformation

2017

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“…The crystal structure of the secondary phase, which is morphologically similar to that shown in Figure 1c, has been investigated in detail by electron diffraction in a transmission electron microscope in Refs. [44][45][46][47] for the Mg-Zn-Ca alloys having chemical compositions similar to those of alloys used in the present work. These studies have unequivocally shown that this phase is Ca 2 Mg 6 Zn 3 , in excellent agreement with the thermodynamic analysis presented in [39].…”

Section: Resultsmentioning

confidence: 76%

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

Vinogradov

Васильев

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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“…Magnesium alloy has many advantages, such as high strength-to-weight, high stiffness-to-weight ratios, and no pollution, etc., so it has a very broad application prospect, and thus it was called green metal material in 21st century [1][2][3]. As for today's energy crisis, it is urgent to accelerate the development of magnesium materials.…”

Section: Introductionmentioning

confidence: 99%

High speed cutting of AZ31 magnesium alloy

Liu

et al. 2016

Journal of Magnesium and Alloys

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Using LBR-370 numerical control lathe, high speed cutting was applied to AZ31 magnesium alloy. The influence of cutting parameters on microstructure, surface roughness and machining hardening were investigated by using the methods of single factor and orthogonal experiment. The results show that the cutting parameters have an important effect on microstructure, surface roughness and machine hardening. The depth of stress layer, roughness and hardening present a declining tendency with the increase of the cutting speed and also increase with the augment of the cutting depth and feed rate. Moreover, we established a prediction model of the roughness, which has an important guidance on actual machining process of magnesium alloy.

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Reducing the tension–compression yield asymmetry of extruded Mg–Zn–Ca alloy via equal channel angular pressing

Cited by 57 publications

References 29 publications

Tailoring Microstructure and Properties of Fine Grained Magnesium Alloys by Severe Plastic Deformation

Tailoring Microstructure and Properties of Fine Grained Magnesium Alloys by Severe Plastic Deformation

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

High speed cutting of AZ31 magnesium alloy

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