Recent progress of Mg–Sn based alloys: the relationship between aging response and mechanical performance

Zhuo, Xiaoru; Zhao, Liyan; Gao, Wei; Wu, Yuna; Liu, Huan; Zhang, Peng; Hu, Zhichao; Jiang, Jinghua; Ma, Aibin

doi:10.1016/j.jmrt.2022.08.126

Cited by 22 publications

(6 citation statements)

References 161 publications

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“…In the Mg-3Sn-1Mn-xLa alloy, the Mn element is wholly dissolved in the α-Mg matrix and plays a solid solution strengthening role [ 33 , 42 , 43 ]. The size and distribution of the Mg 2 Sn and Sn 3 RE 5 phases have a significant impact on the mechanical properties of alloys [ 9 , 11 , 44 , 45 ]. Sn 3 RE 5 is a cracked, rod-shaped phase formed by the combination of Sn and rare earth elements in Mg alloys.…”

Section: Resultsmentioning

confidence: 99%

Study on Microstructural Evolution and Mechanical Properties of Mg-3Sn-1Mn-xLa Alloy by Backward Extrusion

Zhang

Cao

2023

Materials

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Mg-3Sn-1Mn-xLa alloy bars were prepared using backward extrusion, and the effects of the La content on the microstructures and mechanical properties of the alloy were systematically studied using an optical microscope (OM), X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), and tensile tests. The results of this research show that the Mg2Sn phases were mainly formed at the α-Mg grain boundaries and within the grains in the Mg-3Sn-1Mn alloy. After adding a certain amount of La, the plate-shaped MgSnLa compounds consisting of Mg17La2, Mg2Sn, and La5Sn3 gradually disappeared in the α-Mg matrix and grain boundaries. With an increase in La content, the Mg2Sn phase in the crystal was gradually refined and spheroidized. When the content of La reached 1.5%, the tensile strength of the alloy reached 300 Mpa and the elongation reached 12.6%, i.e., 25% and 85% increases, respectively, compared to the Mg-3Sn-1Mn alloy. The plate-shaped compound of Mg-3Sn-1Mn-1.5La had an average length of 3000 ± 50 nm, while the width was 350 ± 10 nm. Meanwhile, the extruded alloy’s grain size was significantly refined, and there were many small cleavage steps and dimples in the fracture surface of the alloy. When the La content reached 2%, the alloy performance showed a downward trend due to the coarsening of the grains. The formed plate-shaped MgSnLa compounds and Mg2Sn phases were consistent with the α-Mg matrix. They effectively pinned the dislocations and grain boundaries, which is the main reason for strengthening the mechanical properties of extrusion alloys.

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Section: Resultsmentioning

confidence: 99%

Study on Microstructural Evolution and Mechanical Properties of Mg-3Sn-1Mn-xLa Alloy by Backward Extrusion

Zhang

Cao

2023

Materials

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“…6 Additionally, the Zn element can promote the precipitation of Mg 2 Sn phases in the Mg-Sn-based alloys and the Mg 2 Sn phases can refine grains and improve strength by the methods of particle-stimulated nucleation (PSN) and pinning grain boundaries. [7][8][9] Zhuo et al reviewed the role of Al, Ca and Zn as alloying elements in Mg-Sn-based alloys and found in portion studies that the Zn element can enlarge the ageing response of Mg-Sn-based alloys. 8 Thus, the Mg-Sn-Zn alloys have gradually become the potential high-strength and plastic Mg alloys.…”

Section: Introductionmentioning

confidence: 99%

“…[7][8][9] Zhuo et al reviewed the role of Al, Ca and Zn as alloying elements in Mg-Sn-based alloys and found in portion studies that the Zn element can enlarge the ageing response of Mg-Sn-based alloys. 8 Thus, the Mg-Sn-Zn alloys have gradually become the potential high-strength and plastic Mg alloys. 10 The equal channel angular pressing (ECAP) method was proposed by a scholar from the Soviet Union in the 1970s and the way can significantly refine grain sizes through the shear force at the two intersection channels and multipass accumulative strain.…”

Section: Introductionmentioning

confidence: 99%

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The microstructure and mechanical properties of Mg-Sn-based alloy processed by differential-thermal equal channel angular pressing

Guo,

Li,

Zhou

et al. 2024

Materials Science and Technology

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Numerous studies of equal channel angular pressing (ECAP) considered the sample and mould temperatures as a whole, ignoring their different control effects during ECAP deformation. In this paper, the microstructure and mechanical properties of Mg-Sn-Zn-Zr (TZK) alloys were investigated after ECAP deformation at different mould and sample temperatures. The results revealed that higher mould temperatures controlled the actual deformation temperatures and lower sample temperatures prevented grain growth during preheating. After ECAP deformation at mould temperature of 300 °C and sample temperature of room temperature, the alloy consisted of abundant dynamical recrystallisation grains, with an elongation of 30% and a strength of 251.49 MPa. This study would provide a novel idea for the optimisation of the ECAP process.

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“…Mg-Sn-based alloys are promising candidates and have received considerable attention in recent years [7]. Mg-Sn-based alloys are aging strengthening alloys, and the maximum equilibrium solid solubility of the Sn element in the α-Mg matrix is approximately 14.48 wt.% [8].…”

Section: Introductionmentioning

confidence: 99%

Study on the Microstructure of Mg-4Zn-4Sn-1Mn-xAl As-Cast Alloys

Liu,

Du,

Peng

et al. 2023

Materials

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In this study, the microstructure of the Mg-4Zn-4Sn-1Mn-xAl (x = 0, 0.3 wt.%, denoted as ZTM441 and ZTM441-0.3Al) as-cast alloys was investigated using scanning electron microscopy (SEM), focused-ion/electron-beam (FIB) micromachining, transmission electron microscopy (TEM), and high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM). The analysis results revealed that the microstructure of the ZTM441 and ZTM441-0.3Al as-cast alloys both mainly consist of the α-Mg matrix, skeleton-shaped MgZn2 eutectic texture, block-shaped Mg2Sn, and Zn/Sn-rich nanoscale precipitate bands along the grain boundary and the interdendrite. Nanoscale α-Mn dispersoids formed in the grain in the ZTM441 alloy, while no α-Mn formed in the ZTM441-0.3Al alloy instead of nanoscale Al3Mn2 particles. In the ZTM441 as-cast alloy, part of the Zn element is dissolved into the α-Mn phase, and part of the Mn element is dissolved into the MgZn2 phase, but in the ZTM441-0.3Al alloy, there are no such characteristics of mutual solubility. Zn and Mn elements are easy to combine in ZTM441 as-cast alloy, while Al and Mn are easy to combine in ZTM441-0.3Al as-cast alloy. The Mg-Zn phases have not only MgZn2-type crystal structure but also Mg4Zn7- and Mg149Zn-type crystal structure in the ZTM441-0.3Al as-cast alloy. The addition of Al changes the combination of Mn and Zn, promotes the formation of Al3Mn2, and the growth of the grain.

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Recent progress of Mg–Sn based alloys: the relationship between aging response and mechanical performance

Cited by 22 publications

References 161 publications

Study on Microstructural Evolution and Mechanical Properties of Mg-3Sn-1Mn-xLa Alloy by Backward Extrusion

Study on Microstructural Evolution and Mechanical Properties of Mg-3Sn-1Mn-xLa Alloy by Backward Extrusion

The microstructure and mechanical properties of Mg-Sn-based alloy processed by differential-thermal equal channel angular pressing

Study on the Microstructure of Mg-4Zn-4Sn-1Mn-xAl As-Cast Alloys

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