Isothermal grain coarsening of extruded Mg-5.5Zn-2Gd-0.6Zr magnesium alloy by simple strain-induced melt activation process

Junkai Fan; Guangyu Yang; Huiyong Tao; Shaojun Liu; Wanqi Jie

Isothermal grain coarsening of extruded Mg-5.5Zn-2Gd-0.6Zr magnesium alloy by simple strain-induced melt activation process

Junkai Fan, Guangyu Yang, Huiyong Tao, Shaojun Liu, Wanqi Jie

School of Materials Sience and Engineering

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

2 Scopus citations

Abstract

The semi-solid microstructure evolution of extruded Mg-5.5Zn-2Gd-0.6Zr experimental magnesium alloy at different isothermal temperatures (600, 610 and 620℃) for different holding time by the simple strain-induced melt activation (SSIMA) process was studied. It is shown that the relationship between the average diameter of α(Mg) grains and the isothermal holding time fits the formula d³- d³₀=K_t at the same isothermal temperature, where the coarsening rate constant K increases with the increase of the isothermal annealing temperature. And its coarsening follows the modified liquid film migration model proposed by Monson-Whitton, et al. α(Mg) grains in longitudinal section coarsen faster than those in transverse section, which is the essential reason of uneven grains in microstructures of the semi-solid slurry prepared by SSIMA process.

Original language	English
Pages (from-to)	2196-2202
Number of pages	7
Journal	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume	44
Issue number	9
State	Published - 1 Sep 2015

Keywords

Coarsening
Extruded magnesium alloy
Microstructure
Semi-solid forming
Simple strain-induced melt activation (SSIMA) process

Cite this

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title = "Isothermal grain coarsening of extruded Mg-5.5Zn-2Gd-0.6Zr magnesium alloy by simple strain-induced melt activation process",

abstract = "The semi-solid microstructure evolution of extruded Mg-5.5Zn-2Gd-0.6Zr experimental magnesium alloy at different isothermal temperatures (600, 610 and 620℃) for different holding time by the simple strain-induced melt activation (SSIMA) process was studied. It is shown that the relationship between the average diameter of α(Mg) grains and the isothermal holding time fits the formula d3- d30=Kt at the same isothermal temperature, where the coarsening rate constant K increases with the increase of the isothermal annealing temperature. And its coarsening follows the modified liquid film migration model proposed by Monson-Whitton, et al. α(Mg) grains in longitudinal section coarsen faster than those in transverse section, which is the essential reason of uneven grains in microstructures of the semi-solid slurry prepared by SSIMA process.",

keywords = "Coarsening, Extruded magnesium alloy, Microstructure, Semi-solid forming, Simple strain-induced melt activation (SSIMA) process",

author = "Junkai Fan and Guangyu Yang and Huiyong Tao and Shaojun Liu and Wanqi Jie",

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T1 - Isothermal grain coarsening of extruded Mg-5.5Zn-2Gd-0.6Zr magnesium alloy by simple strain-induced melt activation process

AU - Fan, Junkai

AU - Yang, Guangyu

AU - Tao, Huiyong

AU - Liu, Shaojun

AU - Jie, Wanqi

PY - 2015/9/1

Y1 - 2015/9/1

N2 - The semi-solid microstructure evolution of extruded Mg-5.5Zn-2Gd-0.6Zr experimental magnesium alloy at different isothermal temperatures (600, 610 and 620℃) for different holding time by the simple strain-induced melt activation (SSIMA) process was studied. It is shown that the relationship between the average diameter of α(Mg) grains and the isothermal holding time fits the formula d3- d30=Kt at the same isothermal temperature, where the coarsening rate constant K increases with the increase of the isothermal annealing temperature. And its coarsening follows the modified liquid film migration model proposed by Monson-Whitton, et al. α(Mg) grains in longitudinal section coarsen faster than those in transverse section, which is the essential reason of uneven grains in microstructures of the semi-solid slurry prepared by SSIMA process.

AB - The semi-solid microstructure evolution of extruded Mg-5.5Zn-2Gd-0.6Zr experimental magnesium alloy at different isothermal temperatures (600, 610 and 620℃) for different holding time by the simple strain-induced melt activation (SSIMA) process was studied. It is shown that the relationship between the average diameter of α(Mg) grains and the isothermal holding time fits the formula d3- d30=Kt at the same isothermal temperature, where the coarsening rate constant K increases with the increase of the isothermal annealing temperature. And its coarsening follows the modified liquid film migration model proposed by Monson-Whitton, et al. α(Mg) grains in longitudinal section coarsen faster than those in transverse section, which is the essential reason of uneven grains in microstructures of the semi-solid slurry prepared by SSIMA process.

KW - Coarsening

KW - Extruded magnesium alloy

KW - Microstructure

KW - Semi-solid forming

KW - Simple strain-induced melt activation (SSIMA) process

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M3 - 文章

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SN - 1002-185X

VL - 44

SP - 2196

EP - 2202

JO - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

JF - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

IS - 9

ER -

Isothermal grain coarsening of extruded Mg-5.5Zn-2Gd-0.6Zr magnesium alloy by simple strain-induced melt activation process

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Keywords

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