High temperature deformation behavior of Mg67Zn28Ca5 metallic glass and its composites

X.L. Fu; M.J. Tan; Y. Chen; A. E. W. Jarfors; M. Gupta; C.H. Shek

doi:10.1016/j.msea.2014.10.051

High temperature deformation behavior of Mg₆₇Zn₂₈Ca₅ metallic glass and its composites

X.L. Fu, M.J. Tan^*, Y. Chen, A. E. W. Jarfors, M. Gupta, C.H. Shek^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

8 Citations (Scopus)

Abstract

Mg₆₇Zn₂₈Ca₅ amorphous alloy specimens with various volume percentage of crystalline phases were obtained by annealing fully amorphous alloy at slightly above crystallization temperature. Strain rate effect of flow stress of Mg₆₇Zn₂₈Ca₅ amorphous alloy and its composites at supercooled liquid region were studied. The strain rate sensitivity m for monolithic metallic glass can approach 1, but all the composites have lower strain rate sensitivity (~0.17). After a prolonged testing period, the deformation mode of Mg₆₇Zn₂₈Ca₅ based composites changed from superplastically into fragmentation mode. Glassy Mg₆₇Zn₂₈Ca₅ exhibits the best superplasticity and thermal stability compared to its devitrified composites.

Original language	English
Pages (from-to)	1-7
Journal	Materials Science & Engineering A
Volume	621
Online published	24 Oct 2014
DOIs	https://doi.org/10.1016/j.msea.2014.10.051
Publication status	Published - 5 Jan 2015

Research Keywords

Composites
Glasses
Heat treatment
Mechanical properties at high temperatures
Metallic
Microstructure

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10.1016/j.msea.2014.10.051

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title = "High temperature deformation behavior of Mg67Zn28Ca5 metallic glass and its composites",

abstract = "Mg67Zn28Ca5 amorphous alloy specimens with various volume percentage of crystalline phases were obtained by annealing fully amorphous alloy at slightly above crystallization temperature. Strain rate effect of flow stress of Mg67Zn28Ca5 amorphous alloy and its composites at supercooled liquid region were studied. The strain rate sensitivity m for monolithic metallic glass can approach 1, but all the composites have lower strain rate sensitivity (~0.17). After a prolonged testing period, the deformation mode of Mg67Zn28Ca5 based composites changed from superplastically into fragmentation mode. Glassy Mg67Zn28Ca5 exhibits the best superplasticity and thermal stability compared to its devitrified composites.",

keywords = "Composites, Glasses, Heat treatment, Mechanical properties at high temperatures, Metallic, Microstructure",

author = "X.L. Fu and M.J. Tan and Y. Chen and Jarfors, {A. E. W.} and M. Gupta and C.H. Shek",

year = "2015",

month = jan,

day = "5",

doi = "10.1016/j.msea.2014.10.051",

language = "English",

volume = "621",

pages = "1--7",

journal = "Materials Science & Engineering A",

issn = "0921-5093",

publisher = "Elsevier Ltd.",

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TY - JOUR

T1 - High temperature deformation behavior of Mg67Zn28Ca5 metallic glass and its composites

AU - Fu, X.L.

AU - Tan, M.J.

AU - Chen, Y.

AU - Jarfors, A. E. W.

AU - Gupta, M.

AU - Shek, C.H.

PY - 2015/1/5

Y1 - 2015/1/5

N2 - Mg67Zn28Ca5 amorphous alloy specimens with various volume percentage of crystalline phases were obtained by annealing fully amorphous alloy at slightly above crystallization temperature. Strain rate effect of flow stress of Mg67Zn28Ca5 amorphous alloy and its composites at supercooled liquid region were studied. The strain rate sensitivity m for monolithic metallic glass can approach 1, but all the composites have lower strain rate sensitivity (~0.17). After a prolonged testing period, the deformation mode of Mg67Zn28Ca5 based composites changed from superplastically into fragmentation mode. Glassy Mg67Zn28Ca5 exhibits the best superplasticity and thermal stability compared to its devitrified composites.

AB - Mg67Zn28Ca5 amorphous alloy specimens with various volume percentage of crystalline phases were obtained by annealing fully amorphous alloy at slightly above crystallization temperature. Strain rate effect of flow stress of Mg67Zn28Ca5 amorphous alloy and its composites at supercooled liquid region were studied. The strain rate sensitivity m for monolithic metallic glass can approach 1, but all the composites have lower strain rate sensitivity (~0.17). After a prolonged testing period, the deformation mode of Mg67Zn28Ca5 based composites changed from superplastically into fragmentation mode. Glassy Mg67Zn28Ca5 exhibits the best superplasticity and thermal stability compared to its devitrified composites.

KW - Composites

KW - Glasses

KW - Heat treatment

KW - Mechanical properties at high temperatures

KW - Metallic

KW - Microstructure

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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84911427571&origin=recordpage

U2 - 10.1016/j.msea.2014.10.051

DO - 10.1016/j.msea.2014.10.051

M3 - RGC 21 - Publication in refereed journal

SN - 0921-5093

VL - 621

SP - 1

EP - 7

JO - Materials Science & Engineering A

JF - Materials Science & Engineering A

ER -

High temperature deformation behavior of Mg₆₇Zn₂₈Ca₅ metallic glass and its composites

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GRF: Thermal Plastic Imprinting of Bulk Metallic Glass for Fabrication of Terahertz Plasmonic Devices

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High temperature deformation behavior of Mg67Zn28Ca5 metallic glass and its composites

Abstract

Research Keywords

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GRF: Thermal Plastic Imprinting of Bulk Metallic Glass for Fabrication of Terahertz Plasmonic Devices

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High temperature deformation behavior of Mg₆₇Zn₂₈Ca₅ metallic glass and its composites