Multiplex intermetallic phases in a gravity die-cast Mg−6.0Zn−1.5Nd−0.5Zr (wt%) alloy

Fanzhi Meng; Shuhui Lv; Qiang Yang; Xin Qiu; Zixiang Yan; Qian Duan; Jian Meng

Journal of Magnesium and Alloys (Jan 2022)

Multiplex intermetallic phases in a gravity die-cast Mg−6.0Zn−1.5Nd−0.5Zr (wt%) alloy

Fanzhi Meng,
Shuhui Lv,
Qiang Yang,
Xin Qiu,
Zixiang Yan,
Qian Duan,
Jian Meng

Affiliations

Fanzhi Meng: State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China; School of Materials Science and Engineering, Changchun University of Science and Technology, 130022, PR China
Shuhui Lv: School of Materials Science and Engineering, Changchun University of Science and Technology, 130022, PR China
Qiang Yang: State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China; Corresponding author.
Xin Qiu: State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China
Zixiang Yan: State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China
Qian Duan: School of Materials Science and Engineering, Changchun University of Science and Technology, 130022, PR China
Jian Meng: State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China

Journal volume & issue: Vol. 10, no. 1
pp. 209 – 223

Abstract

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Components and crystal structures of the intermetallic phases in a gravity die-cast Mg−6.0Zn−1.5Nd−0.5Zr (wt%) alloy were investigated using transmission electron microscopy. The results indicate that this alloy has multiple intermetallic phases and various inner faults. Totally, six eutectoid intermetallic phases, namely W (MgNdZn3), T (Mg39Zn55Nd6), (Mg,Zr)Zn2, Z (Mg28Zn65Nd7), H2 (Mg15Zn70Nd15), and H1 (Mg24Zn64Nd11), were simultaneously observed at grain boundaries, and six precipitates (Z, Mg7Zn3, T, Mg4Zn7, β1′-MgZn2 and β2′-MgZn2) were found in α-Mg grains. Furthermore, faults like sub-grain boundaries, orientation domains (coherent with the same matching plane but with different orientations), stacking faults and twins were observed in the eutectoid intermetallic phases. Finally, some new orientation relationships between the known intermetallic phases were revealed. This paper can provide new insight into alloy design for Mg−Zn−RE (RE: rare earth) based alloys.

Published in Journal of Magnesium and Alloys

ISSN: 2213-9567 (Online)
Publisher: KeAi Communications Co., Ltd.
Country of publisher: China
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.keaipublishing.com/en/journals/journal-of-magnesium-and-alloys/

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