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Reference Number EP/T016728/1
Title Cobalt-free Hard-facing for Reactor Systems
Status Started
Energy Categories NUCLEAR FISSION and FUSION(Nuclear Fission, Nuclear supporting technologies) 100%;
Research Types Basic and strategic applied research 100%
Science and Technology Fields PHYSICAL SCIENCES AND MATHEMATICS (Chemistry) 30%;
PHYSICAL SCIENCES AND MATHEMATICS (Physics) 30%;
PHYSICAL SCIENCES AND MATHEMATICS (Metallurgy and Materials) 40%;
UKERC Cross Cutting Characterisation Not Cross-cutting 100%
Principal Investigator Dr R J Moat

Faculty of Sci, Tech, Eng & Maths (STEM
Open University
Award Type Standard
Funding Source EPSRC
Start Date 01 December 2020
End Date 30 May 2023
Duration 30 months
Total Grant Value £651,532
Industrial Sectors Energy
Region East of England
Programme Energy : Energy
 
Investigators Principal Investigator Dr R J Moat , Faculty of Sci, Tech, Eng & Maths (STEM, Open University (99.996%)
  Other Investigator Professor PJ Bouchard , Materials Engineering, Open University (0.001%)
Dr M Preuss , Materials, University of Manchester (0.001%)
Dr J (John ) Francis , Mechanical, Aerospace and Civil Engineering, University of Manchester (0.001%)
Professor M C Smith , Mechanical, Aerospace and Civil Engineering, University of Manchester (0.001%)
Web Site
Objectives
Abstract Cobalt-based (Co) alloys are extensively used in nuclear reactors, particularly in regions prone to wear and galling such as valves and pumps. This is because they provide outstanding wear resistance, and so improve component life and reduce maintenance requirements. However, these alloys are responsible for a large portion of the radiation exposure of workers at nuclear utilities, due to the formation of Cobalt-60, a gamma-emitting radioactive isotope. For this reason, replacing Co-based hardfacing alloys in future nuclear reactors is highly desirable. For the current Indian prototype fast breeder reactor (PFBR) Nickel-based (Ni) alloys have been used as an alternative, however these alloys are expensive and very susceptible to cracking. A new class of Iron (Fe) based, silicide strengthened systems have shown great potential for hardfacing application. In response to the scale of components that require hardfacing in the PFBR, plasma transfer arc (PTA) deposition is proposed, a highly flexible manufacturing technique, as an alternative to HIPbonding. To date, however, PTA manufacturing of Fe silicide strengthened alloys is yet to be explored. Indeed, the residual stress resulting from PTA processing nickel (Ni)-based alloys, a key driver in the formation of unacceptable cracks and defects, is still to be understood. Successful characterisation, optimisation and simulation of the PTA process and application to Fe based alloy systems is a key step in eliminating Co from nuclear plant
Publications (none)
Final Report (none)
Added to Database 11/10/21