Superplasticity in Mg-Li-Zn alloys processed by high ratio extrusion

Shangli Dong; Tsunemichi Imai; Suk Won Lim; Naoyuki Kanetake; Naobumi Saito; Ichinori Shigematsu

doi:10.1080/10426910701860954

Superplasticity in Mg-Li-Zn alloys processed by high ratio extrusion

Shangli Dong
, Tsunemichi Imai^*
, Suk Won Lim
, Naoyuki Kanetake
, Naobumi Saito
, Ichinori Shigematsu

^*Corresponding author for this work

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

28 Scopus citations

Abstract

Superplastic behavior of Mg-8.5Li-1Zn and Mg-8.5Li-3Zn alloys has been investigated. Dynamic recrystallization occurs in the Mg-Li-Zn alloys during extruding with high ratio after stir casting. Mg-8.5Li-1Zn alloy exhibits an elongation of about 400% at the high strain rate of 1.110-2S-1 at 623K, while the Mg-8.5Li-3Zn alloy shows maximum elongation of more than 540%. The apparent activation energy for superplastic flow of both Mg-8.5Li-1Zn and Mg-8.5Li-3Zn alloys at 573-673K is about 86kJ/mol and 79kJ/mol, respectively, so that the dominant deformation mechanism in Mg-Li-Zn alloys is grain boundary sliding (GBS) controlled by grain boundary diffusion.

Original language	English
Pages (from-to)	336-341
Number of pages	6
Journal	Materials and Manufacturing Processes
Volume	23
Issue number	4
DOIs	https://doi.org/10.1080/10426910701860954
State	Published - Apr 2008
Externally published	Yes

Keywords

Activation energy
Elongation
Extrusion
Fracture
Grain boundary
Magnesium alloys
Magnesium-lithium alloy
Metallographic phases
Plastic flow
Recrystallization
Sliding
Stirring casting
Strain rate
Superplasticity
Tensile testing

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10.1080/10426910701860954

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@article{f29cca6032874be2a925e15af3732a87,

title = "Superplasticity in Mg-Li-Zn alloys processed by high ratio extrusion",

abstract = "Superplastic behavior of Mg-8.5Li-1Zn and Mg-8.5Li-3Zn alloys has been investigated. Dynamic recrystallization occurs in the Mg-Li-Zn alloys during extruding with high ratio after stir casting. Mg-8.5Li-1Zn alloy exhibits an elongation of about 400\% at the high strain rate of 1.110-2S-1 at 623K, while the Mg-8.5Li-3Zn alloy shows maximum elongation of more than 540\%. The apparent activation energy for superplastic flow of both Mg-8.5Li-1Zn and Mg-8.5Li-3Zn alloys at 573-673K is about 86kJ/mol and 79kJ/mol, respectively, so that the dominant deformation mechanism in Mg-Li-Zn alloys is grain boundary sliding (GBS) controlled by grain boundary diffusion.",

keywords = "Activation energy, Elongation, Extrusion, Fracture, Grain boundary, Magnesium alloys, Magnesium-lithium alloy, Metallographic phases, Plastic flow, Recrystallization, Sliding, Stirring casting, Strain rate, Superplasticity, Tensile testing",

author = "Shangli Dong and Tsunemichi Imai and Lim, \{Suk Won\} and Naoyuki Kanetake and Naobumi Saito and Ichinori Shigematsu",

year = "2008",

month = apr,

doi = "10.1080/10426910701860954",

language = "英语",

volume = "23",

pages = "336--341",

journal = "Materials and Manufacturing Processes",

issn = "1042-6914",

publisher = "Taylor and Francis Ltd.",

number = "4",

}

TY - JOUR

T1 - Superplasticity in Mg-Li-Zn alloys processed by high ratio extrusion

AU - Dong, Shangli

AU - Imai, Tsunemichi

AU - Lim, Suk Won

AU - Kanetake, Naoyuki

AU - Saito, Naobumi

AU - Shigematsu, Ichinori

PY - 2008/4

Y1 - 2008/4

N2 - Superplastic behavior of Mg-8.5Li-1Zn and Mg-8.5Li-3Zn alloys has been investigated. Dynamic recrystallization occurs in the Mg-Li-Zn alloys during extruding with high ratio after stir casting. Mg-8.5Li-1Zn alloy exhibits an elongation of about 400% at the high strain rate of 1.110-2S-1 at 623K, while the Mg-8.5Li-3Zn alloy shows maximum elongation of more than 540%. The apparent activation energy for superplastic flow of both Mg-8.5Li-1Zn and Mg-8.5Li-3Zn alloys at 573-673K is about 86kJ/mol and 79kJ/mol, respectively, so that the dominant deformation mechanism in Mg-Li-Zn alloys is grain boundary sliding (GBS) controlled by grain boundary diffusion.

AB - Superplastic behavior of Mg-8.5Li-1Zn and Mg-8.5Li-3Zn alloys has been investigated. Dynamic recrystallization occurs in the Mg-Li-Zn alloys during extruding with high ratio after stir casting. Mg-8.5Li-1Zn alloy exhibits an elongation of about 400% at the high strain rate of 1.110-2S-1 at 623K, while the Mg-8.5Li-3Zn alloy shows maximum elongation of more than 540%. The apparent activation energy for superplastic flow of both Mg-8.5Li-1Zn and Mg-8.5Li-3Zn alloys at 573-673K is about 86kJ/mol and 79kJ/mol, respectively, so that the dominant deformation mechanism in Mg-Li-Zn alloys is grain boundary sliding (GBS) controlled by grain boundary diffusion.

KW - Activation energy

KW - Elongation

KW - Extrusion

KW - Fracture

KW - Grain boundary

KW - Magnesium alloys

KW - Magnesium-lithium alloy

KW - Metallographic phases

KW - Plastic flow

KW - Recrystallization

KW - Sliding

KW - Stirring casting

KW - Strain rate

KW - Superplasticity

KW - Tensile testing

UR - https://www.scopus.com/pages/publications/41949085800

U2 - 10.1080/10426910701860954

DO - 10.1080/10426910701860954

M3 - 文章

AN - SCOPUS:41949085800

SN - 1042-6914

VL - 23

SP - 336

EP - 341

JO - Materials and Manufacturing Processes

JF - Materials and Manufacturing Processes

IS - 4

ER -

Superplasticity in Mg-Li-Zn alloys processed by high ratio extrusion

Abstract

Keywords

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