Project description
Improved turbine components thanks to advances in high-temperature superalloys
High-temperature superalloys consist of a combination of elements that provide excellent mechanical strength, corrosion resistance and thermal stability. The EU-funded HiperTURB project aims to enhance the weldability and castability of high-temperature superalloys, ultimately reducing weight, manufacturing and maintenance costs of turbine components. Researchers will combine innovative chemistry, casting solidification, heat treatment and welding techniques to control grain size, phase formation, segregation and residual stresses. Two new superalloy castings with enhanced weldability will be developed and assessed using advanced simulation techniques. The mechanical properties of the superalloys will be tested at various temperatures. HiperTURB activities will contribute to the creation of more efficient and reliable components operating at high temperatures.
Objective
The objective of HiperTURB is to improve the weldability and castability of high temperature capable superalloy castings. The expected impact will be linked to weight, manufacturing and maintenance cost reduction of TRF components.
This objective will be achieved due to a combination of innovative chemistry adjustments, tailored casting solidification strategies, specific heat treatment and innovative welding techniques to control grain size, phases formation, segregation and residual stresses. Two new superalloy castings with enhanced weldability will be developed. At casting level mould design to control cooling gradient together with the use of inoculants, chillers and shell design will allow to tailor casting solidification. Heat treatment stage will be adjusted in terms of pre and post welding operation sequence (HIP + solution annealing), processing parameters and the introduction of cryogenic heat treatment. Weldability assessment of two new alloy castings will be assessed by standard hot cracking tests and simulated repair and structural welds on simple parts and real geometry-like components. Both TIG and laser based welding processes will be investigated.
Development process will be supported by advanced simulation techniques based on Thermocalc, Dictra, Procast that will enable a more precise approach on final alloy microstructural and castability results. The castability of the alloys will be validated by the design of specific test samples that will be checked to detect casting defects such as shrinkage, hot tearing sensitivity.... Evaluation of internal and external defects will be carried out by non-destructive tests. Mechanical properties of alloys under development such as creep and tensile test at low and high temperature will be performed. Component like geometry cast parts will be manufactured at the end of the project, testing their final properties in terms of castability and weldability.
Fields of science
- engineering and technologymechanical engineeringmanufacturing engineering
- engineering and technologymechanical engineeringvehicle engineeringaerospace engineeringaircraft
- engineering and technologyenvironmental engineeringenergy and fuels
- natural sciencescomputer and information sciencessoftwaresoftware applicationssimulation software
Programme(s)
Funding Scheme
CS2-IA - Innovation actionCoordinator
48200 Durango
Spain