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Reference Number EP/N508494/1
Title Innovative Forging and Fabrication Solutions for the Energy Sector
Status Completed
Energy Categories NUCLEAR FISSION and FUSION(Nuclear Fission, Nuclear supporting technologies) 100%;
Research Types Basic and strategic applied research 50%;
Applied Research and Development 50%;
Science and Technology Fields PHYSICAL SCIENCES AND MATHEMATICS (Metallurgy and Materials) 100%
UKERC Cross Cutting Characterisation Not Cross-cutting 100%
Principal Investigator Dr BP Wynne
No email address given
Engineering Materials
University of Sheffield
Award Type Standard
Funding Source EPSRC
Start Date 01 July 2015
End Date 30 June 2018
Duration 36 months
Total Grant Value £119,903
Industrial Sectors Manufacturing; Energy
Region Yorkshire & Humberside
Programme Energy : Energy
 
Investigators Principal Investigator Dr BP Wynne , Engineering Materials, University of Sheffield (99.998%)
  Other Investigator Dr E Palmiere , Engineering Materials, University of Sheffield (0.001%)
Dr M Jackson , Engineering Materials, University of Sheffield (0.001%)
Web Site
Objectives
Abstract The contribution from the University of Sheffield to the "Innovative Forging and Fabrication Solutions for the Nuclear Industry" project will be on the modelling and its validation of the welding process and development and property validation of post weld heat treatment schedules using the heat treatment simulator produced in EP/L50466X/1. This will be undertaken by Prof Wynne, Dr Palmiere, and Dr Jackson in collaboration with a PhD Student, supported by the grant. Thus the aim of the project in its broadest sense is: Development of quality heat treatment schedules for thick sectioned welds. This will be achieved by the following four work packages. Work Package 1: Validate Finite Element Model of Thick Section Welds produced using Reduced Pressure Electron Beam Welding (Phd Student, UoS, TWI, SFIL)This includes determination of temperature distribution during welding, size of weld zone, size of heat affected zone, cooling rates, and residual stress distribution. Furthermore, material type sensitivity will be investigated from current nuclear grade steels through to next generation materials. Work Package 2: Microstructure Evaluation of As-Welded Microstructure. (PhD Student, UoS) A detailed investigation of the as-welded microstructure in terms of alloy segregation, weld zone sizes, grain size, transformation product, etc will be undertaken using optical and electron microscopy. Results will be compared to the modelling results produced in WP1Work Package 3: Development of Potential Heat Treatment Schedules for As-Welded Materials. (PhD Student, UoS, SFIL)Review of literature on potential heat treatment schedules for welded materials, concentrating on issues relating to the general physical metallurgy, welding methodologies and metallurgical challenges, as well as NDT evaluation techniques. The project has already identified the steel compositions, and so this particular task should be highly focused, identifying material and post-production issues. Thermodynamic modelling of the steel compositions will indicate the phases and phase fractions expected. Initial risks associated with the use of the steel compositions will also be assessed. Work Package 4: Application of Identified Heat Treatment Schedules in the Heat Treatment Simulator. (PhD Student, UoS, SFIL) Following on from the outcomes of WP3, the chosen heat treatment schedules will be undertaken on as welded material using the heat treatment simulator. Mechanical property evaluation will be in the form of tensile tests, Charpy impact tests, crack tip opening displacement tests, and hardness profiles. Microstructure characterisation will produce information on phase fractions, segregation profiles, and microstructure type and uniformity using optical and scanning electron microscopy. These results will then form the basis for large scale trials. Work Package 5: Validate Linkage Between Chosen Heat Treatment and Actual Component. (PhD Student, UoS, SFIL) This work package will compare andcontrast simulated results, both mechanical and microstructure, with an actual component. Extreme areas of the as-forged component will be investigated to ensure good variability coverage. Microstructure at levels above optical, i.e. precipitation density, will be taken thus requiring advanced characterisation methods such as scanning and transmission electron microscopy.
Publications (none)
Final Report (none)
Added to Database 06/10/15