Evolution of Microstructures, Texture, Damping and Mechanical Properties of Hot Extruded Mg-Nd-Zn-Zr Alloy

Wang, Songhui; Zhang, Wencong; Yang, Jingbin; Pan, Jinqi; Wang, Haixuan; Cui, Guorong

doi:10.1007/s11665-021-06134-z

Cited by 10 publications

(9 citation statements)

References 39 publications

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“…It can be seen from Figure 2 that the true strain variable (ε) also had a great effect on the flow stress of the Mg-2.5Nd-0.5Zn-0.5Zr alloy. However, in previous studies [ 3 , 23 , 30 ], a single strain was usually used to establish a simple constitutive equation, and strain-factor parameters were not added in Equation (13). The result showed that the calculated thermal Q could not reflect the real activation energy in the actual deformation process.…”

Section: Resultsmentioning

confidence: 99%

“…In this study, the method for distinguishing recrystallized and deformed grains was that described in Ref. [ 3 ]. With the increase in deformation temperature, the grain size of the alloy gradually grew.…”

Section: Resultsmentioning

confidence: 99%

“…Mg alloys have the benefits of low density, high stiffness, high specific strength and machinability [ 1 ]. They have been widely used in aerospace, automotive, electronics, medical devices and other industries [ 2 , 3 , 4 ]. The mechanical and structural properties of Mg alloys and their response to stresses are currently a hot topic [ 5 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

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Hot Deformation Behavior, Processing Maps and Microstructural Evolution of the Mg-2.5Nd-0.5Zn-0.5Zr Alloy

Wang

Yang

et al. 2022

Materials

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Isothermal hot compression experiments were conducted on Mg-2.5Nd-0.5Zn-0.5Zr alloy to investigate hot deformation behavior at the temperature range of 573–773K and the strain rate range of 0.001s−1–10s−1 using a Gleeble-3500D thermomechanical simulator. The results showed that the rheological curve showed a typical work hardening stage, and there were three different stages: work hardening, transition and steady state. A strain compensation constitutive model was established to predict the flow stress of the Mg-2.5Nd-0.5Zn-0.5Zr alloy, and the results proved that it had high predictability. The main deformation mechanism of the Mg-2.5Nd-0.5Zn-0.5Zr alloy was dislocation climbing. The processing maps were established to distinguish the unstable region from the working region. The maps showed that the instability generally occurred at high strain rates and low temperatures, and the common forms of instability were cracking and flow localization. The optimum machining range of the alloy was determined to be 592–773K and 0.001–0.217 s−1. With the increase in deformation temperature, the grain size of the alloy grew slowly at the 573–673K temperature range and rapidly at the 673–773K temperature range.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hot Deformation Behavior, Processing Maps and Microstructural Evolution of the Mg-2.5Nd-0.5Zn-0.5Zr Alloy

Wang

Yang

et al. 2022

Materials

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“…It has been noted that refining the grain size is an effective technique for enhancing the mechanical properties of magnesium alloys. Grain refinement can be achieved through surface treatment methods such as annealing (Wang et al , 2023) and equal channel angular pressing (Ly et al , 2020). As mentioned earlier, annealing can improve the microstructure of magnesium alloys, subsequently affecting the long-term corrosion resistance of MAO.…”

Section: Introductionmentioning

confidence: 99%

Effect of annealing treatment of hot-rolled AZ31 magnesium alloy on properties and stress corrosion resistance of MAO coatings

Zhou,

Lu,

Jiang

et al. 2024

ACMM

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Purpose This study aims to study the formation mechanism of micro-arc oxidation (MAO) coating on AZ31 magnesium alloy and how the annealing process affects its corrosion resistance. Design/methodology/approach This study involved immersion experiments, electrochemical experiments and slow strain rate tensile experiments, along with scanning electron microscopy, optical microscopy observation and X-ray diffraction analysis. Findings The findings suggest that annealing treatment can refine the grain size of AZ31 magnesium alloy to an average of 6.9 µm at 300°C. The change in grain size leads to a change in conductivity, which affects the performance of MAO coatings. The MAO coating obtained by annealing the substrate at 300°C has smaller pores and porosity, resulting in better adhesion and wear resistance. Originality/value The coating acts as a barrier to prevent corrosive substances from entering the substrate. However, the smaller pores and porosity reduce the channels for the corrosive solution to pass through the coating. When the coating cracks or falls off, the corrosive medium and substrate come into direct contact. Smaller and uniform grains have better corrosion resistance.

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“…Conventionally deformed Mg alloys by plastic processing have strong basal texture and anisotropy [15][16][17][18]. The poor room temperature formability and difficult processing and forming of conventionally processed deformed Mg alloys significantly limit their large-scale application and development [19][20][21][22][23]. Therefore, improving the room temperature forming performance of Mg alloy sheets remains one of the crucial problems that urgently needs to be addressed.…”

Section: Introductionmentioning

confidence: 99%

Asymmetric Extrusion Technology of Mg Alloy: A Review

et al. 2023

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Magnesium (Mg) alloy is a widely used lightweight metal structural material due to its high specific strength and stiffness, excellent damping performance, and recyclability. Wrought Mg alloys are particularly favored in fields such as aerospace, transportation, and biomedical stents. However, most wrought Mg alloys with a hexagonal close-packed (HCP) crystal structure lack sufficient independent slip systems to meet the von Mises criterion for uniform plastic deformation at room temperature. This can result in the formation of a strong basal texture during plastic deformation and poor room temperature plastic formability. Enhancing the room temperature forming performance is therefore a crucial challenge that needs to be addressed in order to expand the application of Mg alloy sheets. Our research group has comprehensively summarized significant work and the latest research progress in improving the room temperature forming of Mg alloy sheets via extrusion technology in recent years. Specifically, we have developed a new type of asymmetric extrusion technology that combines material structure evolution, mechanical properties, and forming behavior analysis. We have elucidated the extrusion process characteristics, texture control mechanism, and forming properties of Mg alloy sheets through plastic deformation mechanisms, mold design, and finite element numerical simulation. The findings of our study present an innovative extrusion technology for the fabrication of highly formable Mg alloy sheets, which can be utilized in various applications.

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Evolution of Microstructures, Texture, Damping and Mechanical Properties of Hot Extruded Mg-Nd-Zn-Zr Alloy

Cited by 10 publications

References 39 publications

Hot Deformation Behavior, Processing Maps and Microstructural Evolution of the Mg-2.5Nd-0.5Zn-0.5Zr Alloy

Hot Deformation Behavior, Processing Maps and Microstructural Evolution of the Mg-2.5Nd-0.5Zn-0.5Zr Alloy

Effect of annealing treatment of hot-rolled AZ31 magnesium alloy on properties and stress corrosion resistance of MAO coatings

Asymmetric Extrusion Technology of Mg Alloy: A Review

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