Journal
MATERIALS SCIENCE AND TECHNOLOGY
Volume 34, Issue 15, Pages 1793-1808Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/02670836.2018.1461594
Keywords
Superalloys; strengthening; yield strength; coherency; precipitation; misfit; APBE; modelling
Funding
- EPSRC/Rolls-Royce Strategic Partnership [EPM005607/1, EP/H022309/1]
- EPSRC [EP/M005607/1] Funding Source: UKRI
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Nickel-based superalloys are currently the material of choice for use in high-temperature applications due to their excellent high-temperature strength. It is understood that many mechanisms contribute to this property, but debate exists regarding how to model these mechanisms and predict the overall strength. This review covers the different strengthening mechanisms occurring in polycrystalline Ni-based superalloys and how these may be modelled, with the aim of revealing the gaps in the literature. It is found that models for precipitation and coherency strengthening are particularly controversial, and a unified model for the yield strength of superalloys is missing from the literature. This is of commercial importance for the design of new alloys with superior mechanical properties to those currently available.
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