Nanoscale icosahedral quasicrystal phase precipitation mechanism during annealing for Mg-Zn-Gd-based alloys

Yuan Tian; Hua Huang; Guangyin Yuan; Chunlin Chen; Zhongchang Wang; Wenjiang Ding

doi:10.1016/j.matlet.2014.05.131

Nanoscale icosahedral quasicrystal phase precipitation mechanism during annealing for Mg-Zn-Gd-based alloys

Yuan Tian, Hua Huang, Guangyin Yuan, Chunlin Chen, Zhongchang Wang, Wenjiang Ding

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

22 Citations (Scopus)

Abstract

We have performed a systematic transmission electron microscopy study of precipitated particles in Mg-Zn-Gd-based alloys after annealing. We find that the Mg-Zn phases and ellipsoidal-shaped icosahedral quasicrystal phases (I-phase) are precipitated and distributed by partition in the grains, which can be attributed to the composition segregation of the alloying elements in the as-cast alloys. The content of alloying element is found to be crucial to the precipitation of nanoscale I-phase. The nanoscale I-phase ranges in size from a few to dozens of nanometers, revealing that the precipitation process satisfies the classical nucleation and growth theory.

Original language	English
Pages (from-to)	236-239
Number of pages	4
Journal	Materials Letters
Volume	130
DOIs	https://doi.org/10.1016/j.matlet.2014.05.131
Publication status	Published - 2014 Sep 1

Keywords

Magnesium
Metals and alloys
Microstructure
Quasicrystalline
Segregation

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Nanoscale icosahedral quasicrystal phase precipitation mechanism during annealing for Mg-Zn-Gd-based alloys",

abstract = "We have performed a systematic transmission electron microscopy study of precipitated particles in Mg-Zn-Gd-based alloys after annealing. We find that the Mg-Zn phases and ellipsoidal-shaped icosahedral quasicrystal phases (I-phase) are precipitated and distributed by partition in the grains, which can be attributed to the composition segregation of the alloying elements in the as-cast alloys. The content of alloying element is found to be crucial to the precipitation of nanoscale I-phase. The nanoscale I-phase ranges in size from a few to dozens of nanometers, revealing that the precipitation process satisfies the classical nucleation and growth theory.",

keywords = "Magnesium, Metals and alloys, Microstructure, Quasicrystalline, Segregation",

author = "Yuan Tian and Hua Huang and Guangyin Yuan and Chunlin Chen and Zhongchang Wang and Wenjiang Ding",

note = "Funding Information: This work was supported by the National Nature Science Foundation of China (Grant no. 51174136 ). Z.W. thanks the financial supports from Grant-in-Aid for Young Scientists (A) (Grant no. 24686069 ), JGC-S Foundation , and Kurata Memorial Hitachi Science and Technology Foundation .",

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AU - Tian, Yuan

AU - Huang, Hua

AU - Yuan, Guangyin

AU - Chen, Chunlin

AU - Wang, Zhongchang

AU - Ding, Wenjiang

N1 - Funding Information: This work was supported by the National Nature Science Foundation of China (Grant no. 51174136 ). Z.W. thanks the financial supports from Grant-in-Aid for Young Scientists (A) (Grant no. 24686069 ), JGC-S Foundation , and Kurata Memorial Hitachi Science and Technology Foundation .

PY - 2014/9/1

Y1 - 2014/9/1

N2 - We have performed a systematic transmission electron microscopy study of precipitated particles in Mg-Zn-Gd-based alloys after annealing. We find that the Mg-Zn phases and ellipsoidal-shaped icosahedral quasicrystal phases (I-phase) are precipitated and distributed by partition in the grains, which can be attributed to the composition segregation of the alloying elements in the as-cast alloys. The content of alloying element is found to be crucial to the precipitation of nanoscale I-phase. The nanoscale I-phase ranges in size from a few to dozens of nanometers, revealing that the precipitation process satisfies the classical nucleation and growth theory.

AB - We have performed a systematic transmission electron microscopy study of precipitated particles in Mg-Zn-Gd-based alloys after annealing. We find that the Mg-Zn phases and ellipsoidal-shaped icosahedral quasicrystal phases (I-phase) are precipitated and distributed by partition in the grains, which can be attributed to the composition segregation of the alloying elements in the as-cast alloys. The content of alloying element is found to be crucial to the precipitation of nanoscale I-phase. The nanoscale I-phase ranges in size from a few to dozens of nanometers, revealing that the precipitation process satisfies the classical nucleation and growth theory.

KW - Magnesium

KW - Metals and alloys

KW - Microstructure

KW - Quasicrystalline

KW - Segregation

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