Interphase boundary segregation of Zn in Mg-Sn-Zn alloys

Chaoqiang Liu; Houwen Chen; Jian Feng Nie

doi:10.1016/j.scriptamat.2016.05.035

Interphase boundary segregation of Zn in Mg-Sn-Zn alloys

Chaoqiang Liu, Houwen Chen, Jian Feng Nie

Materials Science & Engineering

Research output: Contribution to journal › Article › Research › peer-review

79 Citations (Scopus)

Abstract

Additions of Zn can significantly improve the age-hardening response of binary Mg-Sn alloys by refining the distribution of Mg₂Sn precipitates, but its role in the precipitation is still unclear. In this study, the Mg₂Sn precipitates with different morphologies and orientations in a Mg-9.8Sn-1.2Zn (wt.%) alloy are characterized by high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) and STEM X-ray mapping. It is found that Zn atoms invariably segregate to the Mg₂Sn-Mg interface, irrespective of the interfacial structures and orientation relationships of Mg₂Sn. This finding provides insight to the understanding of the enhanced nucleation of Mg₂Sn precipitates in Mg-Sn-Zn alloys.

Original language	English
Pages (from-to)	5-8
Number of pages	4
Journal	Scripta Materialia
Volume	123
DOIs	https://doi.org/10.1016/j.scriptamat.2016.05.035
Publication status	Published - 1 Oct 2016

Keywords

EDS-STEM
HAADF-STEM
Interface segregation
Magnesium alloys
Precipitates

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10.1016/j.scriptamat.2016.05.035

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title = "Interphase boundary segregation of Zn in Mg-Sn-Zn alloys",

abstract = "Additions of Zn can significantly improve the age-hardening response of binary Mg-Sn alloys by refining the distribution of Mg2Sn precipitates, but its role in the precipitation is still unclear. In this study, the Mg2Sn precipitates with different morphologies and orientations in a Mg-9.8Sn-1.2Zn (wt.%) alloy are characterized by high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) and STEM X-ray mapping. It is found that Zn atoms invariably segregate to the Mg2Sn-Mg interface, irrespective of the interfacial structures and orientation relationships of Mg2Sn. This finding provides insight to the understanding of the enhanced nucleation of Mg2Sn precipitates in Mg-Sn-Zn alloys.",

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AU - Liu, Chaoqiang

AU - Chen, Houwen

AU - Nie, Jian Feng

PY - 2016/10/1

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N2 - Additions of Zn can significantly improve the age-hardening response of binary Mg-Sn alloys by refining the distribution of Mg2Sn precipitates, but its role in the precipitation is still unclear. In this study, the Mg2Sn precipitates with different morphologies and orientations in a Mg-9.8Sn-1.2Zn (wt.%) alloy are characterized by high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) and STEM X-ray mapping. It is found that Zn atoms invariably segregate to the Mg2Sn-Mg interface, irrespective of the interfacial structures and orientation relationships of Mg2Sn. This finding provides insight to the understanding of the enhanced nucleation of Mg2Sn precipitates in Mg-Sn-Zn alloys.

AB - Additions of Zn can significantly improve the age-hardening response of binary Mg-Sn alloys by refining the distribution of Mg2Sn precipitates, but its role in the precipitation is still unclear. In this study, the Mg2Sn precipitates with different morphologies and orientations in a Mg-9.8Sn-1.2Zn (wt.%) alloy are characterized by high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) and STEM X-ray mapping. It is found that Zn atoms invariably segregate to the Mg2Sn-Mg interface, irrespective of the interfacial structures and orientation relationships of Mg2Sn. This finding provides insight to the understanding of the enhanced nucleation of Mg2Sn precipitates in Mg-Sn-Zn alloys.

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KW - HAADF-STEM

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KW - Magnesium alloys

KW - Precipitates

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Interphase boundary segregation of Zn in Mg-Sn-Zn alloys

Abstract

Keywords

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