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

S. E. Shin, DongHyun Bae

Research output: Contribution to journalArticle

6 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 languageEnglish
Pages (from-to)61-68
Number of pages8
JournalComposites Part B: Engineering
Volume134
DOIs
Publication statusPublished - 2018 Feb 1

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Carbon Nanotubes
Carbon nanotubes
Nanocomposites
Fatigue of materials
Composite materials
Tensile strength
Fibers
Aluminum alloys
Cracks
Fatigue strength

All Science Journal Classification (ASJC) codes

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

Cite this

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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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Fatigue behavior of Al2024 alloy-matrix nanocomposites reinforced with multi-walled carbon nanotubes. / Shin, S. E.; Bae, DongHyun.

In: Composites Part B: Engineering, Vol. 134, 01.02.2018, p. 61-68.

Research output: Contribution to journalArticle

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