Strengthening and toughening of aluminum by single-walled carbon nanotubes

H. J. Choi, DongHyun Bae

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Effects of single-walled carbon nanotubes (SWNTs) on strengthening and toughening behaviors of aluminum-based composites with grain sizes ranging from nano- to micrometer have been investigated. The strength of composites is enhanced as an increase in SWNT volume and a decrease in grain size. Nanocrystalline composite containing 3.5vol.% SWNTs exhibits good ductility of ∼5% tensile elongation to failure as well as superior yield stress of ∼600MPa. However, the strengthening efficiency of SWNTs becomes half of the theoretical prediction for nanocrystalline composites due to the recovery process around the interface. Nanocrystalline composite containing 2.0vol.% SWNTs shows the fracture toughness of ∼57MPamm1/2, which is five times higher than that of starting aluminum. SWNTs may effectively block the propagation of necks and cracks, providing much improved ductility and toughness.

Original languageEnglish
Pages (from-to)2412-2417
Number of pages6
JournalMaterials Science and Engineering A
Volume528
Issue number6
DOIs
Publication statusPublished - 2011 Mar 15

Fingerprint

Toughening
Strengthening (metal)
Single-walled carbon nanotubes (SWCN)
Aluminum
carbon nanotubes
aluminum
composite materials
Composite materials
ductility
Ductility
grain size
toughness
fracture strength
elongation
Toughness
Yield stress
micrometers
Fracture toughness
Elongation
Crack propagation

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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Strengthening and toughening of aluminum by single-walled carbon nanotubes. / Choi, H. J.; Bae, DongHyun.

In: Materials Science and Engineering A, Vol. 528, No. 6, 15.03.2011, p. 2412-2417.

Research output: Contribution to journalArticle

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