Grain boundary precipitation in Inconel 718 and ATI 718Plus

Bilal Hassan*, Jonathan Corney

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

57 Citations (Scopus)
826 Downloads (Pure)


Grain boundary precipitates in Inconel 718 and ATI 718Plus are important to control during hot working processes, since they can control the grain size. Precipitating excessive or insufficient amounts can be detrimental to the final component. Therefore, it is important for manufacturers to understand the formation and kinetics of grain boundary precipitation and the effect this has on mechanical properties. This review considers the background of grain boundary precipitation, including the effect of the thermal stability of γ' and γ" phases. In addition, the effect of stress on the grain boundary phases and their precipitation kinetics in different conditions are also included. Also, the impact of grain boundary precipitation on the mechanical properties is explored.
Original languageEnglish
Pages (from-to)1879-1889
Number of pages11
JournalMaterials Science and Technology
Issue number16
Early online date7 Jun 2017
Publication statusPublished - 2 Nov 2017


  • eta phase
  • delta phase
  • precipitation
  • Inconel 718
  • ATI 718Plus
  • kinetics
  • mechanical properties
  • superalloys


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