Precipitation on stacking faults in Mg–9.8wt%Sn alloy

Liu, C.Q.; He, Cong; Chen, H.W.; Nie, Jian–Feng

doi:10.1016/j.jmst.2019.11.024

Cited by 13 publications

(5 citation statements)

References 55 publications

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“…[39] Other experimental observations made by atomic-resolution STEM indicated that c þ a h i dislocations dissociate in cold deformed samples of Mg-Bi and Mg-Sn alloys. [8,40] Detailed and systematic characterization of more alloy systems and alloys subjected to different deformation conditions is needed in the future to resolve the controversial reports. Equally, more computation-based studies are needed in the future on solute-dislocation interactions and quantitative effects of solutes on dislocation slip activities in different slip systems.…”

Section: B Slip Twinning and Grain Boundary Slidingmentioning

confidence: 99%

Microstructure, Deformation, and Property of Wrought Magnesium Alloys

Nie

Shin

Zeng

2020

Metall Mater Trans A

138

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Pure magnesium (Mg) develops a strong basal texture after conventional processing of hot rolling or extrusion. Consequently, it exhibits anisotropic mechanical properties and is difficult to form at room temperature. Adding appropriate alloying elements can weaken the basal texture or even change it, but the improvement in formability and mechanical properties is still far from expectations. Over the past 20 years, considerable efforts have been made and significant progress has been made on wrought Mg alloys at the fundamental and technological levels. At the fundamental level, textures formed in sheets and extrusions of different alloy compositions and produced under different strain paths or thermomechanical processing conditions are relatively well established, with the assistance of the advanced characterization technique of electron backscatter diffraction. At the technological level, room temperature formability of sheet has been significantly improved, and tension-compression yield asymmetry of extrusion is also remarkably reduced or eliminated. This paper starts with an overview of dislocations, stacking faults and twins, and deformation of single crystals of pure Mg along different orientations and under different loading conditions, followed by a review of microstructure (texture and grain size) and deformation of polycrystalline pure Mg with different textures, grain sizes, and loading conditions. With this information as a base, texture, grain size, and deformation of polycrystalline Mg alloy sheets and extrusions produced under different processing conditions are systematically examined and compared. Remaining and emerging scientific and technology issues are then highlighted and discussed in the context of texture and grain size. The need for better-resolution diffraction and spectroscopy techniques is also discussed in the relationship between texture change and grain boundary solute segregation.

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Section: B Slip Twinning and Grain Boundary Slidingmentioning

confidence: 99%

Microstructure, Deformation, and Property of Wrought Magnesium Alloys

Nie

Shin

Zeng

2020

Metall Mater Trans A

138

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“…In Mg alloys containing Zn or Sn elements, such as Mg-Zn-Sn, Mg-Zn, and Mg-Sn alloys, the second phases usually include MgZn 2 , Mg 4 Zn 7 , Mg 2 Zn 11 , Mg 2 Sn, etc. [31][32][33][34][35][36][37][38]. In Mg alloys, the Mn element usually forms the α-Mn particles, promotes grain refinement, and improves the corrosion resistance [39,40].…”

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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“…Magnesium alloys are lighter material having higher strength, stiffness attracted widespread interest in improving fuel e ciency and reducing carbon dioxide emissions from vehicles [6 -12]. Mg-Sn acquired a great interest on the past two decades due to its ability in developing high strength and the need to develop rare earth-free wrought magnesium alloys [13][14][15]. The solubility limit of Sn in Mg is high at elevated temperature (14.5 wt % at 561 °C) and low on lower temperature, this phenomena makes it suitable for precipitate hardening treatment [17,18].…”

Section: Introductionmentioning

confidence: 99%

Influence of Si Addition on the Microstructure and Mechanical Behaviour of Mg-5sn-3zn-1mn Alloy

Sundarraju¹,

K.R²,

2021

Preprint

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The microstructural, mechanical behaviour of Mg-5Sn-3Zn-1Mn alloy with different Si additions (0.5, 1, 1.5 wt. % Si) are investigated and morphological changes of Mg-5Sn are observed with the addition of each element like 3Zn and 1Mn. Si added Mg-5Sn-3Zn-1Mn alloy exhibits two different phases namely Mg 2 Sn and Mg 2 Si. Two distinct phases observed are rod like Mg 2 Sn phase and Chinese script Mg 2 Si upto 1wt%. When Si addition exceeds 1.5% polygonal shaped primary Mg 2 Si particles are formed. In Mg-5Sn-3Zn-1Mn alloy addition of Si up to 1wt% enhances the mechanical properties adequately. Above 1 wt% of Si addition, a slight reduction on tensile property is noticed, which is due to the formation of hard, brittle polygonal primary and coarse Chinese script phases.

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Precipitation on stacking faults in Mg–9.8wt%Sn alloy

Cited by 13 publications

References 55 publications

Microstructure, Deformation, and Property of Wrought Magnesium Alloys

Microstructure, Deformation, and Property of Wrought Magnesium Alloys

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

Influence of Si Addition on the Microstructure and Mechanical Behaviour of Mg-5sn-3zn-1mn Alloy

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