Investigation of the Microstructure Evolution and Deformation Mechanisms of a Mg-Zn-Zr-RE Twin-Roll-Cast Magnesium Sheet by In-Situ Experimental Techniques

Máthis, Kristián; Horváth, Klaudia; Farkas, Gergely; Choe, Heeman; Shin, Kwang Seon; Vinogradov, Alexei

doi:10.3390/ma11020200

Cited by 9 publications

(4 citation statements)

References 33 publications

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“…In addition, a method for the production of magnesium alloys by two-roll casting was proposed in the literature [16], where it was found by microstructure techniques that not only the mechanical differences in specimen properties are small but also the dislocation activity strong enough to observe higher process hardening in magnesium alloys under rolling conditions. In [17], an analytical model was proposed to predict the strain-hardening behavior of twins and the variation of twin integration number during the deformation of polycrystalline magnesium alloys by combining the twin fraction prediction and strain-hardening method with crystal shaping elements and consisting of matrix and twin crystals.…”

Section: Introductionmentioning

confidence: 99%

Machining hardening and dislocation modeling of magnesium alloys based on Fields-Backofen equation

Zhang,

Liang,

Fan

et al. 2023

Applied Mathematics and Nonlinear Sciences

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Magnesium alloys are now widely used, and the Fields-Backofen equation is combined with an investigation of the properties of common magnesium alloys in order to be able to better analyze them. In this paper, some properties, applications and superiority of magnesium alloys are first analyzed, in which the plastic deformation mechanism slip and twinning of magnesium alloys are particularly explored in detail. Focusing on the stages and model of machining hardening dislocations of magnesium alloy, and combined with Fields-Backofen equation, a model of machining hardening and dislocations of magnesium alloy based on Fields-Backofen optimization is constructed. Then the constructed model was applied to stage III of machining hardening dislocations in magnesium alloy for performance testing. The predicted and actual maximum values of the model were 132MPa and 30MPa, which were in basic agreement with 130MPa and 32MPa. The saturation stresses ranged from 50 MPa to 6 MPa for temperatures from 100°C to 500°C when the strain rate of the dislocation processing stage was 10−2 s−1, and from 55 MPa to 10 MPa for temperatures from 100°C to 500°C at a strain rate of 10−3 s −1. Finally, only basal slip and twin initiation with higher saturation stresses were obtained at lower temperatures. As the temperature continues to increase, the dislocation density decreases, plastic deformation becomes easier, and then the saturation stress decreases.

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Section: Introductionmentioning

confidence: 99%

Machining hardening and dislocation modeling of magnesium alloys based on Fields-Backofen equation

Zhang,

Liang,

Fan

et al. 2023

Applied Mathematics and Nonlinear Sciences

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“…Appropriate annealing can eliminate internal stress and distortion energy at grain boundary. Annealing includes full annealing and stress relief annealing, which full annealing making the grain recrystallize or even grow up and increase the plastic and decrease the strength of the material [9,10]. The stress relief annealing can not only reduce or dispel the residual stress produced in cold and hot working and forming of deformed magnesium alloy products, but also eliminate the residual stress in castings or ingots [11,12].…”

Section: Introductionmentioning

confidence: 99%

Effect of annealing temperature on corrosion properties of rolled AZ31-Ce magnesium alloy

Ning

Kong

2020

SN Appl. Sci.

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The corrosion properties of rolled AZ31 magnesium alloy addition Ce before and after annealing at different rolling temperatures (200 °C, 250 °C, 300 °C and 350 °C) and the corrosion resistance and surface morphology of different sections of the samples were studied. The results showed that the corrosion rate and weight loss of the plate without annealing were higher than that of the plate after annealing. The corrosion resistance of the transverse direction-normal direction (TD-ND) cross section was the most, and the corrosion pits after annealing were shallower than that of unannealed samples. The low Ce element content can improve the corrosion resistance of magnesium alloy. In addition, the above properties were the best at 200 °C whether annealed or not. Fig. 8 a Area percentage after corroded of each cross section at different temperatures, b schematic diagram of grain size and morphology with different cross sections

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“…Magnesium (Mg) alloys are the lightest metallic structural materials, compared to aluminum, titanium, and steel [ 1 ]. With the advantages of low density, high specific strength, good damping capacity, and abundant resources, Mg alloys have attracted considerable attention in an automotive industry responding to energy saving and lightweight strategy [ 2 , 3 , 4 , 5 , 6 , 7 ]. However, the poor room temperature ductility and limited strength of Mg alloys have retarded their wider application severely.…”

Section: Introductionmentioning

confidence: 99%

Strengthening Effects of Zn Addition on an Ultrahigh Ductility Mg-Gd-Zr Magnesium Alloy

Zhang

Zheng

et al. 2018

Materials

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A newly developed Mg-2Gd-0.5Zr-xZn (x = 0.5, 1.0, 2.0, 3.0 wt %) alloy system exhibits significant strengthening by doping with Zn. In order to understand the strengthening mechanism, the microstructure, texture evolution, and mechanical properties of ultrahigh ductility Mg-2Gd-0.5Zr alloys with a Zn addition were systematically investigated. The addition of Zn results in the formation of Mg-Gd-Zn intermetallic compounds along grain boundaries, which encourages grain refinement during hot extrusion via the particle stimulated nucleation (PSN) mechanism. Furthermore, during texture sharpening the pole changes from <20true2¯1> to <01true1¯0>, which also occurred in the extruded alloys with Zn addition, which is unfavorable for the basal slip and tensile twinning. Mg-2Gd-0.5Zr-3Zn shows well-balanced strength and ductility with a tensile yield strength (YS) and ultimate tensile strength (UTS) of 285 and 314 MPa, accompanied by a high tensile elongation of 24%. They are superior to those of commercial AZ31. The enhanced strength is attributed to grain refinement, precipitation strengthening, and texture sharpening induced by alloying with Zn. The research result is also of great value to the development of low rare-earth, high strength, and high room temperature ductility magnesium alloy.

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Investigation of the Microstructure Evolution and Deformation Mechanisms of a Mg-Zn-Zr-RE Twin-Roll-Cast Magnesium Sheet by In-Situ Experimental Techniques

Cited by 9 publications

References 33 publications

Machining hardening and dislocation modeling of magnesium alloys based on Fields-Backofen equation

Machining hardening and dislocation modeling of magnesium alloys based on Fields-Backofen equation

Effect of annealing temperature on corrosion properties of rolled AZ31-Ce magnesium alloy

Strengthening Effects of Zn Addition on an Ultrahigh Ductility Mg-Gd-Zr Magnesium Alloy

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