Surface precipitation on engineering alloys

Research output: Contribution to conferenceAbstract


The nucleation and growth of solid state precipitates is used extensively
to tailor the bulk mechanical properties of many engineering alloys. It is
less well appreciated that precipitation can also be induced to occur on
the surfaces of engineering alloys using simple heat treatments raising
the possibility of using precipitation as a form of surface treatment.
Surface precipitation occurs through a nucleation and growth process
with kinetics that suggest mass transfer by surface (or interface)
diffusion plays the dominant role. In this presentation, surface
precipitation in a number of Al based alloys is presented, the physical
principles underlying the phenomena are discussed and some
interesting possibilities for ‘surface physical metallurgy’ are highlighted.
Questions of the competition in phase formation on the surface, the
compositions inherited by the growing surface precipitates and the
coupling of bulk and surface diffusion are discussed.
Original languageEnglish
Number of pages2
Publication statusPublished - 2015
EventInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials (PTM) 2015 - Westin Whistler Resort & Spa, Whistler, Canada
Duration: 28 Jun 20153 Jul 2015


ConferenceInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials (PTM) 2015
Abbreviated titlePTM 2015
Internet address


  • Aluminum
  • Engineering alloys
  • Precipitation
  • Surfaces

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