A comparative study of plastic deformation mechanisms in room-temperature and cryogenically deformed magnesium alloy AZ31

Zhang, Kai; Shao, Zhutao; Daniel, Christopher S.; Turski, Mark; Pruncu, Catalin I.; Li, Lihui; Robson, Joseph D.; Jiang, Jun

doi:10.1016/j.msea.2021.140821

Cited by 26 publications

(4 citation statements)

References 29 publications

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“…Previous studies have shown that the strengthening effect caused by twin boundary and twin interaction is much more effective than dislocation density strengthening. 33, 34 Consequently, it leads to the accumulating of dislocation at the grain boundaries further increasing the yield strength.…”

Section: Resultsmentioning

confidence: 99%

Effect of low temperature and high strain rate compression on the microstructure evolution and mechanical behavior of Mg-2Y-0.6Nd-0.6Zr alloy

Luo

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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Mg-2Y-0.6Nd-0.6Zr alloy was implemented for compression test via split Hopkinson pressure bar under the conditions of low temperature and a high strain rate. The microstructure evolution and deformation mechanism of the processed material were characterized by optical microscopy (OM), electron backscatter diffraction (EBSD) and scanning electron microscopy (SEM) during the testing of low-temperature dynamic compression. As a result, Mg-2Y-0.6Nd-0.6Zr alloy exhibited a positive strain rate strengthening processed by low-temperature dynamic compression along the RD. In addition, the dynamic compressive strength and yield strength are significantly enhanced with the increasing strain rate, following the emerging of tension twins and a small amount of compression twins. The primary deformation mechanisms are the prismatic <a > slip system and {10[Formula: see text]2} tension twins. The Mg-2Y-0.6Nd-0.6Zr was fractured in a brittle manner at low temperature.

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Section: Resultsmentioning

confidence: 99%

Effect of low temperature and high strain rate compression on the microstructure evolution and mechanical behavior of Mg-2Y-0.6Nd-0.6Zr alloy

Luo

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…Accordingly, the influence of texture of ZK61 magnesium alloy in rolling state on the microstructure and properties of plate rolling is particularly important. Simulating and predicting the influence of micro-deformation mode startup on texture and macro-mechanical properties are also significant to provide a theoretical basis for developing ZK61 magnesium-alloy plate with high strength and excellent mechanical properties in the future [ 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Plastic Deformation Mechanism of High Strength and Toughness ZK61 Magnesium Alloy Plate by Multipass Horizontal Continuous Rolling

Chen

Liu

et al. 2023

Materials

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ZK61 magnesium-alloy plate with high tensile strength and elongation is obtained by combined multipass symmetric hot rolling and asymmetric warm rolling. Deformation history considering varying strain rate obtained from the macro-finite element analysis of the selected passes are introduced into the viscoplastic self-consistent model (VPSC) as initial boundary conditions for macro- multiscale and micro-multiscale coupling analysis. VPSC simulation results show that in the initial stage of rolling deformation, the basal <a> slip is the dominated deformation mode, supplemented by prismatic <a> slip and pyramidal <c+a> slip. With increased rolling strain, the pyramidal <c+a> slip presents competitive relationship with basal <a> slip, and the activation amount of {10—11} compression twins is limited. During asymmetric rolling, the basal <a> slip is dominant, followed by the pyramidal <c+a> slip. Experimental results show that the basal texture is gradually strengthened after symmetric rolling, and grain size is refined due to the activation and recrystallization of twins. Asymmetric rolling makes the basal texture deflect 10° to the rolling direction and further refine the grain size. With the ongoing of symmetric rolling, the mechanical anisotropy of the plate weakens, and the yield strength, tensile strength, and plasticity of the material improves. In particular, after asymmetric rolling, the tensile strength in the RD and TD directions of the plate reaches 391.2 MPa and 398.9 MPa, whereas the elongation reaches 19.8% and 25.5%.

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“…However, the poor ductility of polycrystalline Mg (resulting from the HCP crystal structure with few slip systems) and their relatively lower strength compared to other competing alloys are the major obstacles in this regard. The research community has addressed these issues via alloying [4][5][6], heat treatment [7][8][9], thermomechanical processing [10][11][12][13], severe plastic deformation [14][15][16], and introducing reinforcing particles [17][18][19][20]. In fact, the properties of Mg-based alloys and composites are controlled by the fabrication method, morphology and volume fraction of reinforcements, the grain size of the matrix, and secondary thermomechanical processing [21].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical properties of as-cast and wrought Mg–Ni in-situ formed alloys

Maleki

Jamei

Emamy

et al. 2023

Materials Science and Technology

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The effects of nickel addition to magnesium in the hypoeutectic range were investigated in the as-cast and extruded conditions. At low Ni content of 5 wt-%, the grain-boundary eutectics were present in the grain refined α-Mg matrix; while at high Ni content of 15 wt-%, the eutectic constituent became the matrix of the alloy with the appearance of α-Mg rosettes. The addition of Ni up to 15 wt-% led to a significant enhancement of the strength-ductility balance. Moreover, the formation of long Mg2Ni particles at the boundaries of eutectic colonies was explained based on the cooling curve thermal analysis results. Furthermore, remarkable grain refinement by dynamic recrystallisation (DRX) and fragmentation/dispersion of intermetallic particles during hot extrusion led to the improvement of tensile strength, ductility, and toughness.

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A comparative study of plastic deformation mechanisms in room-temperature and cryogenically deformed magnesium alloy AZ31

Cited by 26 publications

References 29 publications

Effect of low temperature and high strain rate compression on the microstructure evolution and mechanical behavior of Mg-2Y-0.6Nd-0.6Zr alloy

Effect of low temperature and high strain rate compression on the microstructure evolution and mechanical behavior of Mg-2Y-0.6Nd-0.6Zr alloy

Plastic Deformation Mechanism of High Strength and Toughness ZK61 Magnesium Alloy Plate by Multipass Horizontal Continuous Rolling

Microstructure and mechanical properties of as-cast and wrought Mg–Ni in-situ formed alloys

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