REF2014 Impact Case Study: Improved Creep-Fatigue-Oxidation Resistance in Gas Turbine Disc Materials

  • Jie Tong (Participant)

Impact: Economic & Commercial Impacts

Description of impact

Research into new-generation disc materials at the University of Portsmouth has significantly improved the understanding of damage tolerance under creep-fatigue-oxidation conditions experienced in aero-engine components. These new materials have been used in Rolls-Royce engines and enable aircraft to operate more efficiently at higher temperatures, with a major impact on CO2 emission and a significant impact on economy.

Who is affected

Aircraft engine manufacturers


The Mechanical Behaviour of Materials (MBM) group at UoP has been working on fatigue crack growth behaviour in nickel-based superalloys for many years, in collaboration with Rolls-Royce (RR) and the Ministry of Defence (now QinetiQ and Dstl). The research carried out at Portsmouth has impacted on the development and validation of a new generation of nickel-based superalloys via a power metallurgy route, including U720Li and RR1000, which have since been used in Rolls-Royce engines including Trent 500, 900, 1000; BR 700, 710 and 725. The new materials have allowed engines to operate at higher temperatures compared with those using traditional wrought alloys, with significant reduction of CO2 emission as well as much improved structural integrity of fracture-critical turbine discs.
Impact statusOpen
Category of impactEconomic & Commercial Impacts
Impact levelBenefit (delivered impact)


  • materials
  • superalloys
  • Rolls-Royce


  • REF2014