Strain hardening behavior of Mg–Y alloys after extrusion process

Zhao, Chaoyue; Li, Ziyan; Shi, Jiahui; Chen, Xianhua; Tu, Teng; Luo, Zhu; Cheng, Renju; Atrens, Andrej; Pan, Fusheng

doi:10.1016/j.jma.2019.09.004

Cited by 81 publications

(10 citation statements)

References 37 publications

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“…In the first part (P1–P2), there is an elasto-plastic transition at this stage and the slip is massively activated makes the decrease in strain hardening rate slow down [ 43 , 44 , 45 ]. In the second part (P2–P4), at P2, the twins grew up in many grains, as shown in Figure 9 .…”

Section: Discussionmentioning

confidence: 99%

Twinning Behavior, Microstructure Evolution and Mechanical Property of Random-Orientated ZK60 Mg Alloy Compressed at Room Temperature

Zhang

et al. 2023

Materials

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In this study, the uniaxial compression of random orientation ZK60 Mg alloy to different strains was performed at room temperature. The microstructure evolution was characterized mainly using electron backscattered diffraction (EBSD), and the mechanical property was evaluated by the Vickers hardness test. During compression, extension twins nucleated, grew, and engulfed the grain. Twins form a texture with the c-axis parallel to the compression direction. With the massive nucleation and expansion of extension twins during compression, the twin boundary (TB) brought the grain refinement, and the twin boundary-dislocation interaction significantly increased the strain hardening rate of ZK60 Mg alloy, both leading to its significantly increasement of the hardness.

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Section: Discussionmentioning

confidence: 99%

Twinning Behavior, Microstructure Evolution and Mechanical Property of Random-Orientated ZK60 Mg Alloy Compressed at Room Temperature

Zhang

et al. 2023

Materials

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“…To ensure uniform temperature of the elevated temperature experiments, tensile samples were kept warm at test temperature for at least 15 min before being tested. Results of phase analysis were cited from our earlier works, [5,7,10,18] which were evaluated using a Rigaku D/MAX-2500PC X-ray diffractometer (XRD). A JEOL JSM-7800F fieldemission scanning electron microscope (SEM) equipped with a HKL Channel 5 electron backscattered diffraction (EBSD) system was used to operate orientation analysis before and after tensile tests and scan step-size was 0.6 mm.…”

Section: Methodsmentioning

confidence: 99%

“…[1,2] Despite all these advantages, the widespread application of Mg alloys was seriously prevented because of their poor ductility and RT-forming performance caused by limited slip systems and strong basal texture. [3][4][5] To enhance mechanical properties of Mg alloys, strain hardening, closely related to dislocation movement, comes into view. [6,7] Dislocation multiplication can be conducive to performance enhancement.…”

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confidence: 99%

“…">Microstructure CharacterizationFigure 1 shows the XRD patterns and illustrates the phase composition of as-extruded Mg-3X. [5,7,10,18] The phase in Mg-3Al, Mg-3Zn, and Mg-3Y is α-Mg phase and there is no significant second phase in the α-Mg matrix, which indicates that the alloying elements are mainly dissolved in the matrix. In Mg-3Sn and Mg-3Gd, there is a small amount of second-phase precipitates, which are Mg 2 Sn and Mg 5 Gd, respectively.…”

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confidence: 99%

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Temperature Effect on Strain Hardening Behaviors of As‐Extruded Binary Magnesium Alloys

Zhao

Chen

et al. 2021

Adv Eng Mater

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Mg alloys, one of the lightest metallic structural materials, are used in many fields to reduce weight of components and parts due to their superior properties such as high specific strength and stiffness and favorable heat-resistance. [1,2] Despite all these advantages, the widespread application of Mg alloys was seriously prevented because of their poor ductility and RT-forming performance caused by limited slip systems and strong basal texture. [3][4][5] To enhance mechanical properties of Mg alloys, strain hardening, closely related to dislocation movement, comes into view. [6,7] Dislocation multiplication can be conducive to performance enhancement. Current researches paid attention mainly to effects of some parameters, such as grain size, twinning and second phase, on strain-hardening behaviors of Mg alloys. [8][9][10][11] However, service temperature, which can affect dislocation movement and accumulation of forest of dislocations, has a huge influence on critical resolved shear stress (CRSS) of slip systems. [12,13] Then, elevated temperature performance of some Mg alloys significantly decrease due to rapid loss of CRSS. Moreover, high-temperature deformation behaviors of Mg alloys may be influenced by diverse alloying elements. [14,15] The results from Jia et al. [16] and Yu et al. [17] also revealed that the mechanical properties for different alloys have different variation with the increase in temperature. Thus, it is necessary to carry out more researches about the effect of temperature on strain-hardening response to Mg alloys with various alloying elements.In this work, as-extruded Mg-3X (X ¼ Al, Zn, Sn, Y, and Gd) alloys were taken into consideration to investigate their strain-hardening behavior at room and elevated temperatures systematically. The work will be beneficial to analyze high-temperature deformation process in Mg alloys. Results Microstructure CharacterizationFigure 1 shows the XRD patterns and illustrates the phase composition of as-extruded Mg-3X. [5,7,10,18] The phase in Mg-3Al, Mg-3Zn, and Mg-3Y is α-Mg phase and there is no significant second phase in the α-Mg matrix, which indicates that the alloying elements are mainly dissolved in the matrix. In Mg-3Sn and Mg-3Gd, there is a small amount of second-phase precipitates, which are Mg 2 Sn and Mg 5 Gd, respectively. Figure 2a-e show the IPFs of these alloys with different alloying elements, which illustrate that fully dynamic recrystallization (DRX) occurs and uniform equiaxed grains are produced. Figure 2f shows the average grain size of Mg-3X alloys and conforms that grain-size refinement happened after extrusion treatment evidently. Average grain sizes of 21.8, 4.4, 12.6,and 10.5 μm, respectively. In addition to Mg-3Sn, the decreases in grain size of Mg-3X alloys are chiefly attributed to solute atoms pinning boundaries, and grain size of Mg-3Sn is also influenced by particle-stimulated

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“…Contrary to grain size, texture significantly influences magnesium alloys’ shielding capabilities. [ 88 ] Dual‐phase Mg–9Li alloys’ electromagnetic shielding characteristics have been assessed regarding rolling strain. [ 33 ] Most grains change from having a random orientation to having a normal direction (ND) when the rolling strain rises, as shown in Figure a–c.…”

Section: Factors Influencing Emimentioning

confidence: 99%

Historical Progress in Electromagnetic Interference Shielding Effectiveness of Conventional Mg Alloys Leading to Mg‐Li‐Based Alloys: A Review

Ashraf,

Guo,

et al. 2023

Adv Eng Mater

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Magnesium‐alloy (Mg‐alloy) materials have attracted considerable attention recently due to their potential applications in electromagnetic interference (EMI) shielding. EMI shielding is a technique to prevent unwanted electromagnetic fields from interfering with the regular operation of electronic devices and systems. EMI shielding is essential for electronics, communication, computers, aerospace, and defence, where high performance and reliability are required. A material’s EMI shielding effectiveness (SE) depends on several factors: its conductivity, magnetic permeability, reflectivity, absorption, and multiple scattering. Mg‐alloys have several advantages over other conventional shielding materials, such as Al‐alloys. These alloys have a lower density, higher specific strength and stiffness, and a higher damping capacity. Mg‐alloys also have high conductivity and magnetic permeability, which can enhance the SE of the material. Moreover, through various methods, such as alloying, heat treatment, surface treatment, and composite fabrication, Mg alloys can be modified to improve their SE and other properties. This review summarizes the recent progress and challenges in developing Mg‐alloy materials for EMI shielding applications. We discuss the effects of different factors on Mg‐alloys’ SE, such as composition, microstructure, frequency, and thickness. Also, we discuss the importance of Mg‐Li alloys and why they are better electromagnetic shielding materials than conventional Mg alloys. Finally, we provide some perspectives and suggestions for future research directions.This article is protected by copyright. All rights reserved.

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Strain hardening behavior of Mg–Y alloys after extrusion process

Cited by 81 publications

References 37 publications

Twinning Behavior, Microstructure Evolution and Mechanical Property of Random-Orientated ZK60 Mg Alloy Compressed at Room Temperature

Twinning Behavior, Microstructure Evolution and Mechanical Property of Random-Orientated ZK60 Mg Alloy Compressed at Room Temperature

Temperature Effect on Strain Hardening Behaviors of As‐Extruded Binary Magnesium Alloys

Historical Progress in Electromagnetic Interference Shielding Effectiveness of Conventional Mg Alloys Leading to Mg‐Li‐Based Alloys: A Review

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