Crystal structure of the mirror symmetry 10H-type long-period stacking order phase in Mg–Y–Zn alloy

Yi, Jian-Xiong; Tang, Bi‐Yu; Chen, Ping; Li, Donglin; Peng, Liming; Ding, Wenjiang

doi:10.1016/j.jallcom.2010.09.140

Cited by 26 publications

(10 citation statements)

References 44 publications

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“…The high strength of such alloys is attributed to the presence of long-period stacking ordered phases (LPSO), which are characterised by the fact that the basal planes are enriched with Y and Zn at periodic intervals [ 1 , 2 ]. These ordered structures can have different stacking sequences: 10H [ 3 , 4 ], 12R [ 5 , 6 ], 14H [ 1 , 7 , 8 ], 18R [ 1 , 7 , 8 , 9 ] and 24R [ 10 ]. Investigations have shown that LPSO phases have a significant influence on hot deformation behaviour and dynamic recrystallisation.…”

Section: Introductionmentioning

confidence: 99%

Hot Deformation and Dynamic Recrystallisation Behaviour of Twin-Roll Cast Mg-6.8Y-2.5Zn-0.4Zr Magnesium Alloy

2021

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In this work, the deformation behaviour of a twin-roll cast (TRC) Mg-6.8Y-2.5Zn-0.4Zr alloy during plane strain compression was characterised by high-temperature testing. Based on the experimental data, the values of strain-rate sensitivity, the efficiency of power dissipation and the instability parameter were investigated under the conditions of various hot deformation parameters. In contrast to conventionally cast material, no lamellae of the LPSO (long period stacking ordered) phase were precipitated in the magnesium matrix after TRC. The precipitation of fine lamellar LPSO phases only occurred during cooling to forming temperature after the heat treatment. Dynamic recrystallization (DRX) hardly occurred during deformation at temperatures between 350 °C and 400 °C. This can be attributed to the precipitation of the lamellar LSPO phases, which contribute to retardation of the DRX process. At higher deformation temperatures and strain rates DRX is pronounced and the twin-induced (TRDX) as well as continuous dynamic recrystallization could be identified as the dominant softening mechanisms. The processing maps were established by superimposing the instability map over the power dissipation map, this being associated with microstructural evolution analysis in the hot deformation processes. Two instability zones could be recognised for the twin-roll cast and heat-treated Mg-6.8Y-2.5Zn-0.4Zr alloy: (1) 350 °C to 460 °C and 0.01 s−1 to 0.3 s−1 and (2) 485 °C to 525 °C and 2.5 s−1 to 10 s−1, where deformation is not favourable.

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Section: Introductionmentioning

confidence: 99%

Hot Deformation and Dynamic Recrystallisation Behaviour of Twin-Roll Cast Mg-6.8Y-2.5Zn-0.4Zr Magnesium Alloy

2021

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“…2 However inferior mechanical properties, low ductility and low heat stability limits its spread of use. 2,3 Therefore, many studies have been done to improve the mechanical properties of magnesium alloys. Magnesium is the eighth most abundant element on Earth and is easily recyclable, which contributes to environmental protection.…”

Section: Introductionmentioning

confidence: 99%

Effect of heat pre-treatment and extrusion on the structure and mechanical properties of WZ21 magnesium alloy

Dvorský¹,

Kubásek²,

Vojtìch³

et al. 2018

Mater. Tehnol.

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The magnesium alloy WZ21 was prepared by a combination of conventional casting, extrusion and heat treatment. The effect of various processing conditions on the final structure, mechanical and corrosion properties were investigated. Long-period stacking ordered (LPSO) phases were observed in the as-cast structure; however, they were at least partially dissolved during the extrusion or heat treatment. Thermally stable Mg24Y5 was observed in the structure as another dominant phase. The application of heat treatment to extruded products causes significant grain growth, and, therefore, the loss of mechanical properties. On the contrary, heat treatment performed before extrusion has a strong positive effect on the observed mechanical properties. In both cases, the thermal treatment positively affected the corrosion resistance of the prepared materials although the effect is more significant for material annealed before extrusion. After appropriate processing, the WZ21 alloy was characterized by the high value of the tensile yield strength of 337 MPa and really promising corrosion rate in simulated body fluid (SBF) (0.75 mm/year).

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“…Magnesium (Mg) alloys, as the lightest metallic structural materials, have attracted great attention because of their low density, high specific strength, good damping capacity and easy recycling [1][2][3]. However, the inherently weak properties of Mg alloys, such as low strength, inferior ductility and poor thermal stability, seriously limit their wide applications in engineering.…”

Section: Introductionmentioning

confidence: 99%

Study of Mg–Gd–Zn–Zr alloys with long period stacking ordered structures

Zhang

Bian

et al. 2013

Materials Science and Engineering: A

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Crystal structure of the mirror symmetry 10H-type long-period stacking order phase in Mg–Y–Zn alloy

Cited by 26 publications

References 44 publications

Hot Deformation and Dynamic Recrystallisation Behaviour of Twin-Roll Cast Mg-6.8Y-2.5Zn-0.4Zr Magnesium Alloy

Hot Deformation and Dynamic Recrystallisation Behaviour of Twin-Roll Cast Mg-6.8Y-2.5Zn-0.4Zr Magnesium Alloy

Effect of heat pre-treatment and extrusion on the structure and mechanical properties of WZ21 magnesium alloy

Study of Mg–Gd–Zn–Zr alloys with long period stacking ordered structures

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