Fatigue behavior of Al2024 alloy-matrix nanocomposites reinforced with multi-walled carbon nanotubes

S. E. Shin; D. H. Bae

doi:10.1016/j.compositesb.2017.09.034

Fatigue behavior of Al2024 alloy-matrix nanocomposites reinforced with multi-walled carbon nanotubes

S. E. Shin, D. H. Bae

Department of Materials Science and Engineering

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

16 Citations (Scopus)

Abstract

Fatigue behavior of aluminum alloy 2024 (Al2024) matrix composites reinforced with multi-walled carbon nanotubes (MWCNTs) is investigated under the tension–compression fatigue test condition. Tensile and fatigue strength of the Al2024/MWCNT composites increases with increasing the MWCNT content. Al2024/4 vol.% MWCNT composite shows the notably enhanced fatigue strength of 600 MPa at the 2.5×10⁶ cycles and the ratio of tensile strength to fatigue strength of 0.78. When the composite is cyclically loaded, the developed incompatibility between the matrix and the fiber induces the fiber pull-out (not shown under tension) and it acts as a bridge when the cracks propagate. Thus, as the content of MWCNT increases in the composite, the prevailing bridging behavior of MWCNTs enhances the number of fatigue cycle, thereby increasing the fatigue strength.

Original language	English
Pages (from-to)	61-68
Number of pages	8
Journal	Composites Part B: Engineering
Volume	134
DOIs	https://doi.org/10.1016/j.compositesb.2017.09.034
Publication status	Published - 2018 Feb 1

Bibliographical note

Funding Information:
This work was supported by National Research Foundation of Korea (NRF) funded by the Ministry of Education ( NRF-2017R1A2B2007062 ).

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Mechanics of Materials
Mechanical Engineering
Industrial and Manufacturing Engineering

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title = "Fatigue behavior of Al2024 alloy-matrix nanocomposites reinforced with multi-walled carbon nanotubes",

abstract = "Fatigue behavior of aluminum alloy 2024 (Al2024) matrix composites reinforced with multi-walled carbon nanotubes (MWCNTs) is investigated under the tension–compression fatigue test condition. Tensile and fatigue strength of the Al2024/MWCNT composites increases with increasing the MWCNT content. Al2024/4 vol.% MWCNT composite shows the notably enhanced fatigue strength of 600 MPa at the 2.5×106 cycles and the ratio of tensile strength to fatigue strength of 0.78. When the composite is cyclically loaded, the developed incompatibility between the matrix and the fiber induces the fiber pull-out (not shown under tension) and it acts as a bridge when the cracks propagate. Thus, as the content of MWCNT increases in the composite, the prevailing bridging behavior of MWCNTs enhances the number of fatigue cycle, thereby increasing the fatigue strength.",

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note = "Funding Information: This work was supported by National Research Foundation of Korea (NRF) funded by the Ministry of Education ( NRF-2017R1A2B2007062 ).",

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