Effect of stirring on solid solution hardening

O. D. Adigun, A. Oni, B. A. Obadele, S. O. Olusunle, I. E. Abegunde, K. B. Omonubi

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


In the present study, the influence of stirring speed on the solid solution hardening of cast aluminium alloy leading to improvement in microhardness values have been reported. Stir casting method was used to prepare percentage compositions of Al-Cu alloys between 0 and 15 wt% Cu. Different stirring speed of 0 rev/min, 10 rev/min, 50 rev/min and 90 rev/min were used to make test sample and materials produced were characterized for hardness. Hardness values of the 0-15 wt% Cu solute addition were observed to independently increase progressively with increase in stirring speed. The increase in microhardness observed is attributed to increase in the dispersion of Cu solute in the Al solution caused by the stirring action which contributed to impeding plastic deformation in the Al lattice. The study further indicates that stirring could be a vital metallurgical processing tool to enhance hardness during alloying.

Original languageEnglish
Pages (from-to)7740-7744
Number of pages5
JournalMaterials Today: Proceedings
Publication statusPublished - 2021
Externally publishedYes
Event3rd International Conference on Materials, Manufacturing and Modelling, ICMMM 2021 - Vellore, India
Duration: 19 Mar 202121 Mar 2021


  • Alloying
  • Dislocation movement
  • Hardness
  • Plastic deformation
  • Solid solution hardening

ASJC Scopus subject areas

  • General Materials Science


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