Study on the planar segregation of solute atoms in Mg-Al-Gd alloy

Gu, Xiaolong; Chen, Leng; Yang, Ping

doi:10.1016/j.scriptamat.2018.02.041

Cited by 22 publications

(11 citation statements)

References 34 publications

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“…The formation of a LPSO structure involves a change in both structure and composition [12][13][14][15]. Specifically, the FCC SU is transformed from HCP structure by operating of a <1 ̅ 00> hcp /3 type Shockley partial dislocation on the basal plane.…”

mentioning

confidence: 99%

Strain self-accommodation during growth of 14H type long-period stacking ordered (LPSO) structures in Mg-Zn-Gd alloy

Kiguchi

Konno

et al. 2020

Scripta Materialia

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confidence: 99%

Strain self-accommodation during growth of 14H type long-period stacking ordered (LPSO) structures in Mg-Zn-Gd alloy

Kiguchi

Konno

et al. 2020

Scripta Materialia

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“…Gu et al applied DFT calculation to modify the γ″ phase structure. Gu et al carried out first principle calculation to understand the segregation behavior.…”

Section: Precipitate Structurementioning

confidence: 99%

Atomic Scale Investigation on Precipitates and Defects of Mg–RE Alloys: A Review

Zhu

Chen

2018

Adv Eng Mater

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Magnesium rare-earth (Mg-RE) alloys with are playing an increasingly important role in many industrial fields due to the improvement of mechanical properties and formability from RE alloying. In addition to the traditional researches on the relationship between macroscopic mechanical properties and micro-structures, atomic scale characterization methods have been rapidly developed and widely applied to reveal the interior of these alloys. Precipitates and defects are known to be the dominant factors that influence the mechanical behaviors as well as plastic responses. Common strengthening precipitates in Mg-RE alloys include long perio d stacking ordered structure (LPSO), β serial, γ serial metastable precipitates. This review mainly considers and discusses the recent development in atomic scale investigation on Mg-RE alloy, including the common strengthening phases and interactions between defects (dislocations, twins) and existing strengthening precipitates.

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“…Moreover, we recently proposed that the concentrated area is mainly Gd according to the experimental result by 3DAP in Mg-Al-Gd (Type I) alloy, i.e. Gd and Al may be not synchronized during LPSO formation [25]. The situation in other alloy system especially for early stage of LPSO formation is unclear.…”

Section: Introductionmentioning

confidence: 99%

Solute Clusters/Enrichment at the Early Stage of Ageing in Mg–Zn–Gd Alloys Studied by Atom Probe Tomography

Chen

Yang

2018

Acta Metall. Sin. (Engl. Lett.)

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The chemical enrichment/ordering of solute atoms in Mg matrix are crucial to understand the formation mechanism of long-period stacking ordered (LPSO) structures. In this study, three-dimensional distribution of solute elements in an Mg-Zn-Gd alloy during ageing process is quantitatively characterized by three-dimensional atom probe (3DAP) tomography. Based on the radius distribution function, it is found that Zn-Gd solute pairs in Mg matrix appear mainly in two peaks at early stage of ageing and the separation distance between Zn and Gd atoms is well rationalized by the first-principles calculation. Moreover, the fraction of Zn-Gd solute pairs increases first and decreases subsequently due to the precipitation of LPSO structures. Moreover, the composition of structural unit in LPSO structure and the solute enrichment around it are quantified. It is found that Zn and Gd elements are synchronized in the LPSO structure, and solute segregation of pure Zn or Gd is not observed at the transformation front of the LPSO structure in this alloy. In addition, the crystallography of transformation front is further determined by 3DAP data.

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Study on the planar segregation of solute atoms in Mg-Al-Gd alloy

Cited by 22 publications

References 34 publications

Strain self-accommodation during growth of 14H type long-period stacking ordered (LPSO) structures in Mg-Zn-Gd alloy

Strain self-accommodation during growth of 14H type long-period stacking ordered (LPSO) structures in Mg-Zn-Gd alloy

Atomic Scale Investigation on Precipitates and Defects of Mg–RE Alloys: A Review

Solute Clusters/Enrichment at the Early Stage of Ageing in Mg–Zn–Gd Alloys Studied by Atom Probe Tomography

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