The assisted nucleation of θ' in AL-CU alloys

Research output: Contribution to conferencePaper


To improve understanding of the assistance that individual heterogeneous sites afford nucleation of key strengthening precipitate phases recent studies have refocused attention on the precise nature of the barriers to nucleation. This approach has been applied in the present investigation of the earliest stages of microstructural evolution of indium precipitates and θ' plates in an Al-In binary and Al-Cu-In ternary alloys. Focusing on the identity of preferred nucleation sites and the role of pre-age deformation on subsequent precipitation this work identified that the presence of crystal defects was found to influence subsequent nucleation of In' and therefore the resulting distribution and average particle size of θ' plates, acting as preferred sites for θ' despite the availability of matrix dislocations.

Original languageEnglish
Number of pages6
Publication statusPublished - 1 Dec 2005
EventInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials (PTM) 2005 - Phoenix Arizona USA, Phoenix, United States of America
Duration: 29 May 20053 Jun 2005


ConferenceInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials (PTM) 2005
Abbreviated titlePTM 2005
CountryUnited States of America


  • Al-Cu-In alloys
  • Assisted nucleation
  • Electron microscopy
  • Metastable precipitation

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