Ductility improvement and fatigue studies in Mg-CNT nanocomposites

C. S. Goh; J. Wei; L. C. Lee; M. Gupta

doi:10.1016/j.compscitech.2007.10.057

Ductility improvement and fatigue studies in Mg-CNT nanocomposites

C. S. Goh^*
, J. Wei
, L. C. Lee
, M. Gupta

^*Corresponding author for this work

National University of Singapore
Agency for Science, Technology and Research, Singapore

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

209 Scopus citations

Abstract

The ductility improvement and fatigue behaviour of magnesium reinforced with 1.3 wt% of carbon nanotubes (CNTs) were investigated in this study. Dislocation studies were conducted to determine the deformation behaviour of the nanocomposite. A comparison was made between Mg-1.3CNT nanocomposite and monolithic Mg to identify the effect of CNTs on Mg. Ductility improvement was found to be the result of the high activity of the basal slip system and the initiation of prismatic 〈a〉 slip. Constant stress amplitude cyclic tests revealed that the cycles to failure for the Mg-1.3CNT nanocomposite is lower than that of the monolithic Mg. Both monolithic Mg and Mg-1.3CNT nanocomposite were found to harden upon cycling. The formation of sessile forest dislocations was identified as one of the main hardening causes.

Original language	English
Pages (from-to)	1432-1439
Number of pages	8
Journal	Composites Science and Technology
Volume	68
Issue number	6
DOIs	https://doi.org/10.1016/j.compscitech.2007.10.057
State	Published - May 2008
Externally published	Yes

Keywords

A. Metal matrix composites
B. Fatigue
Carbon nanotubes
D. Transmission electron microscopy (TEM)

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10.1016/j.compscitech.2007.10.057

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title = "Ductility improvement and fatigue studies in Mg-CNT nanocomposites",

abstract = "The ductility improvement and fatigue behaviour of magnesium reinforced with 1.3 wt\% of carbon nanotubes (CNTs) were investigated in this study. Dislocation studies were conducted to determine the deformation behaviour of the nanocomposite. A comparison was made between Mg-1.3CNT nanocomposite and monolithic Mg to identify the effect of CNTs on Mg. Ductility improvement was found to be the result of the high activity of the basal slip system and the initiation of prismatic 〈a〉 slip. Constant stress amplitude cyclic tests revealed that the cycles to failure for the Mg-1.3CNT nanocomposite is lower than that of the monolithic Mg. Both monolithic Mg and Mg-1.3CNT nanocomposite were found to harden upon cycling. The formation of sessile forest dislocations was identified as one of the main hardening causes.",

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T1 - Ductility improvement and fatigue studies in Mg-CNT nanocomposites

AU - Goh, C. S.

AU - Wei, J.

AU - Lee, L. C.

AU - Gupta, M.

PY - 2008/5

Y1 - 2008/5

N2 - The ductility improvement and fatigue behaviour of magnesium reinforced with 1.3 wt% of carbon nanotubes (CNTs) were investigated in this study. Dislocation studies were conducted to determine the deformation behaviour of the nanocomposite. A comparison was made between Mg-1.3CNT nanocomposite and monolithic Mg to identify the effect of CNTs on Mg. Ductility improvement was found to be the result of the high activity of the basal slip system and the initiation of prismatic 〈a〉 slip. Constant stress amplitude cyclic tests revealed that the cycles to failure for the Mg-1.3CNT nanocomposite is lower than that of the monolithic Mg. Both monolithic Mg and Mg-1.3CNT nanocomposite were found to harden upon cycling. The formation of sessile forest dislocations was identified as one of the main hardening causes.

AB - The ductility improvement and fatigue behaviour of magnesium reinforced with 1.3 wt% of carbon nanotubes (CNTs) were investigated in this study. Dislocation studies were conducted to determine the deformation behaviour of the nanocomposite. A comparison was made between Mg-1.3CNT nanocomposite and monolithic Mg to identify the effect of CNTs on Mg. Ductility improvement was found to be the result of the high activity of the basal slip system and the initiation of prismatic 〈a〉 slip. Constant stress amplitude cyclic tests revealed that the cycles to failure for the Mg-1.3CNT nanocomposite is lower than that of the monolithic Mg. Both monolithic Mg and Mg-1.3CNT nanocomposite were found to harden upon cycling. The formation of sessile forest dislocations was identified as one of the main hardening causes.

KW - A. Metal matrix composites

KW - B. Fatigue

KW - Carbon nanotubes

KW - D. Transmission electron microscopy (TEM)

UR - https://www.scopus.com/pages/publications/40649104794

U2 - 10.1016/j.compscitech.2007.10.057

DO - 10.1016/j.compscitech.2007.10.057

M3 - 文章

AN - SCOPUS:40649104794

SN - 0266-3538

VL - 68

SP - 1432

EP - 1439

JO - Composites Science and Technology

JF - Composites Science and Technology

IS - 6

ER -

Ductility improvement and fatigue studies in Mg-CNT nanocomposites

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Keywords

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