Effect of carbon nanotubes on the mechanical properties of cast Al–Si–Cu alloys

Mitsuhiro Okayasu, Shauha Wu, Indah Uswatun Hasanah

Research output: Contribution to journalArticlepeer-review


To enhance the mechanical properties of cast Al–Si–Cu alloys (ADC12), 0.3% of carbon nanotubes (CNTs) was added. The cast ADC12–0.3%CNT samples were synthesised via heated mould continuous casting for the creation of fine grains, and the artificial aging process was conducted at 173°C for 13 h to obtain precipitation hardening. The reinforcement and refinement of eutectic Si and precipitates (Al2Cu and Mg2Si) were achieved by adding CNTs, which leads to a high tensile strength of about 450 MPa and a relatively high ductility of about 10%. The obtained tensile strength and 0.2% proof stress are more than twice as high as those of the conventional cast ADC12 alloy. The refinement of the microstructures could be due to the interruption of their growth caused by the CNTs.

Original languageEnglish
Pages (from-to)237-245
Number of pages9
JournalMaterials Science and Technology (United Kingdom)
Issue number4
Publication statusPublished - 2022


  • Aluminium alloy
  • carbon nanotube
  • casting
  • precipitate hardening
  • tensile properties

ASJC Scopus subject areas

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


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