Research on long-period-stacking-ordered phase in Mg–Zn–Dy–Zr alloy

Zhang, Jinshan; Xin, Chao; Cheng, Weili; Bian, Lichun; Wang, Hongxia; Xu, Chunxiang

doi:10.1016/j.jallcom.2012.12.165

Cited by 24 publications

(5 citation statements)

References 22 publications

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“…Yamada et al 9 pointed out that the addition of Zn is attributed to the formation of 18R-LPSO phase in Mg-2.1Gd-0.6Y-0.2Zr (at.%) alloy, in which both the strength and plasticity are enhanced significantly at low temperatures. These improved mechanical properties are well elucidated in terms of the increment of critical resolved shear stress of basal or non-basal slips 10 , the interface between LPSO phase and Mg matrix 11 and the formation of kink bands 9 12 13 14 .…”

mentioning

confidence: 99%

Degradation behavior of Mg-based biomaterials containing different long-period stacking ordered phases

Peng

Guo

et al. 2014

Sci Rep

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Long-period stacking ordered (LPSO) phases play an essential role in the development of magnesium alloys because they have a direct effect on mechanical and corrosion properties of the alloys. The LPSO structures are mostly divided to 18R and 14H. However, to date there are no consistent opinions about their degradation properties although both of them can improve mechanical properties. Herein we have successfully obtained two LPSO phases separately in the same Mg-Dy-Zn system and comparatively investigated the effect of different LPSO phases on degradation behavior in 0.9 wt.% NaCl solution. Our results demonstrate that a fine metastable 14H-LPSO phase in grain interior is more effective to improve corrosion resistance due to the presence of a homogeneous oxidation film and rapid film remediation ability. The outstanding corrosion resistant Mg-Dy-Zn based alloys with a metastable 14H-LPSO phase, coupled with low toxicity of alloying elements, are highly desirable in the design of novel Mg-based biomaterials, opening up a new avenue in the area of bio-Mg.

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mentioning

confidence: 99%

Degradation behavior of Mg-based biomaterials containing different long-period stacking ordered phases

Peng

Guo

et al. 2014

Sci Rep

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“…Importing a small amount of B to the as-cast Mg 94 Zn 2.5 Y 2.5 Mn 1 alloy could significantly increase the volume fraction of LPSO phase from 5.8% at 0 wt% B to 21.9% at 0.003 wt% B. Zhang et al [68,81] contributed the increase in LPSO phase to the lowered stacking faults energy (SFE) by adding various alloying elements that have large differences with Mg in atomic radius. As for the Zr element, however, its increase could suppress the formation of LPSO phases in the as-cast Mg 94-x Zn 1.5 Dy 4.5 Zr x alloy, and Mg 8 ZnDy eutectic phases, rather than LPSO phase, were observed with 0.35 at.% addition in this alloy [79].…”

Section: Effect Of Alloying Element On Microstructurementioning

confidence: 78%

“…Apart from the LPSO-forming elements, such as RE, Cu and Ni, other elements were also added into Mg-RE-Zn alloys in order to tailor their microstructure and mechanical properties. By far, the reported alloying elements in Mg-RE-Zn alloys include Zr [78,79], Sr [80], Ca [81,82], B [68], Ti [83], Sn [84] and Mn [85] elements. More recently, the B 4 C and TiB 2 particles were even introduced in the LPSOcontaining alloys [86,87].…”

Section: Effect Of Alloying Element On Microstructurementioning

confidence: 99%

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Microstructure and Mechanical Properties of Mg–RE–TM Cast Alloys Containing Long Period Stacking Ordered Phases: A Review

Liu

Huang

Sun

et al. 2018

Acta Metall. Sin. (Engl. Lett.)

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Casting magnesium alloys hold the greatest share of magnesium application products due to their short processing period, low cost and near net shape forming. Compared with conventional commercial magnesium alloys or other Mg-RE-based alloys, the novel Mg-RE-TM cast alloys with long period stacking ordered (LPSO) phases usually possess a higher strength and are promising candidates for aluminum alloy applications. Up to now, two ways: alloying design and casting process control (including subsequent heat treatments), have been predominantly employed to further improve the mechanical properties of these alloys. Alloying with other elements or ceramic particles could alter the solidification pattern of alloys, change the morphology of LPSO phases and refine the microstructures. Different casting techniques (conventional casting, rapidly solidification, directional solidification, etc.) introduce various microstructure characteristics, such as dendritic structure, nanocrystalline, metastable phase, anisotropy. Further heat treatments could activate the transformation of various LPSO structures and precipitation of diverse precipitates. All these evolutions exert great impacts on the mechanical properties of the LPSO-containing alloys. However, the underlying mechanisms still remain a subject of debate. Therefore, this review mainly provides the state of the art of the casting magnesium alloys research and the accompanying challenges and summarizes some topics that merit future investigation for developing high-performance Mg-RE-TM cast alloys.

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“…In comparison with an achievement of metastable strengthening phases by means of a solid solution and aging treatment (T6) [1][2][3], the nano-sized strengthening REB x compounds in Mg-RE (RE: rare-earth elements) alloys prepared by the recently developed boriding technique under high pressure [4], have two merits. They have super-high thermal stability (T m > 2000°C) [5], and thus the nano-sized configuration maintains invariable at elevated temperatures, improving heat stability and creep resistance.…”

Section: Introductionmentioning

confidence: 99%

First-principles calculations of structural stability and elastic properties of REB12 strengthening phases in boriding Mg–RE alloys

Guo

Zou

et al. 2015

Journal of Alloys and Compounds

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Research on long-period-stacking-ordered phase in Mg–Zn–Dy–Zr alloy

Cited by 24 publications

References 22 publications

Degradation behavior of Mg-based biomaterials containing different long-period stacking ordered phases

Degradation behavior of Mg-based biomaterials containing different long-period stacking ordered phases

Microstructure and Mechanical Properties of Mg–RE–TM Cast Alloys Containing Long Period Stacking Ordered Phases: A Review

First-principles calculations of structural stability and elastic properties of REB12 strengthening phases in boriding Mg–RE alloys

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