A 12R long-period stacking-ordered structure in a Mg-Ni-Y alloy

Liu, Cheng; Zhu, Yuman; Luo, Qun; Liu, Bin; Gu, Qinfen; Li, Qian

doi:10.1016/j.jmst.2018.06.015

Cited by 99 publications

(5 citation statements)

References 32 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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“…Several crystal structures have been reported for the LPSO phases in the Mg-Ni-Y system. Depending on the Ni and Y content and thermal treatment of the alloy 10H, 12R, 14H, 18R and 24R were reported [29,[32][33][34][35][36][37][38]. Wang et al [34] studied the Mg-Ni-Y equilibrium diagram using a thermodynamic calculation.…”

Section: Discussionmentioning

confidence: 99%

Anisotropic Plastic Behavior in an Extruded Long-Period Ordered Structure Mg90Y6.5Ni3.5 (at.%) Alloy

Garcés¹,

Barea

Stark

et al. 2020

Crystals

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The Mg 90 Y 6.5 Ni 3.5 alloy composed almost completely of the Long-Period-Stacking-Ordered (LPSO) phase has been prepared by casting and extrusion at high temperature. An elongated microstructure is obtained where the LPSO phase with 18R crystal structure is oriented with its basal plane parallel to the extrusion direction. Islands of α-magnesium are located between the LPSO grains. The mechanical properties of the alloy are highly anisotropic and depend on the stress sign as well as the relative orientation between the stress and the extrusion axes. The alloy is stronger when it is compressed along the extrusion direction. Under this configuration, the slip of dislocations in the basal plane is highly limited. However, the activation of kinking induces an increase in the plastic deformation. In the transversal extrusion direction, some grains deform by the activation of basal slip. The difference in the yield stress between the different stress configurations decreases with the increase in the test temperature. The evolution of internal strains obtained during in-situ compressive experiments reveals that tensile twinning is not activated in the LPSO phase.

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“…Table 5 below outlines common materials utilized in various components of 3D multi-die stacking. Thermal stability These materials are carefully selected to ensure compatibility, reliability, and performance in stacked die configurations (Liu et al, 2021).…”

Section: Materials Used In 3d Stackingmentioning

confidence: 99%

Advancements in Semiconductor Packaging: Exploring the Potential of 3D Multi-Die Stacking Technology

et al. 2023

IJFMR

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The rapid evolution of semiconductor packaging technologies has led to the emergence of 3D multi-die stacking as a promising approach for achieving higher levels of integration and performance in electronic devices. This research paper comprehensively examines the advancements, applications, challenges, economic implications, regulatory considerations, and future prospects of 3D stacking technology. Through an in-depth analysis of current research, industry trends, and market dynamics, the paper elucidates the technical, economic, and regulatory aspects shaping the adoption and development of 3D stacking. Key findings highlight the potential benefits of 3D stacking in enhancing device functionality, optimizing manufacturing processes, and addressing environmental sustainability. The paper also identifies critical challenges such as thermal management, signal integrity, and regulatory compliance that semiconductor manufacturers must overcome to realize the full potential of 3D stacking. Furthermore, the paper outlines future directions, including integration with emerging technologies, advancements in materials and processes, and sustainability initiatives, to drive continued innovation in semiconductor packaging.

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A 12R long-period stacking-ordered structure in a Mg-Ni-Y alloy

Cited by 99 publications

References 32 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

Anisotropic Plastic Behavior in an Extruded Long-Period Ordered Structure Mg90Y6.5Ni3.5 (at.%) Alloy

Advancements in Semiconductor Packaging: Exploring the Potential of 3D Multi-Die Stacking Technology

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