go to top scroll for more


Projects: Projects for Investigator
Reference Number EP/K007866/1
Title DMW-Creep: Influence of Inhomogeneity on Creep of Dissimilar Metal Welds
Status Completed
Energy Categories Nuclear Fission and Fusion(Nuclear Fission, Nuclear supporting technologies) 50%;
Not Energy Related 25%;
Other Power and Storage Technologies(Electric power conversion) 25%;
Research Types Applied Research and Development 100%
Science and Technology Fields PHYSICAL SCIENCES AND MATHEMATICS (Metallurgy and Materials) 50%;
ENGINEERING AND TECHNOLOGY (Mechanical, Aeronautical and Manufacturing Engineering) 50%;
UKERC Cross Cutting Characterisation Not Cross-cutting 100%
Principal Investigator Dr CE Truman
No email address given
Mechanical Engineering
University of Bristol
Award Type Standard
Funding Source EPSRC
Start Date 01 March 2013
End Date 28 February 2017
Duration 48 months
Total Grant Value £737,970
Industrial Sectors Energy
Region South West
Programme Energy : Energy
Investigators Principal Investigator Dr CE Truman , Mechanical Engineering, University of Bristol (100.000%)
Web Site
Abstract This research is part of a national UK programme through the RCUK Energy programme and India's Department of Atomic Energy. The research involves the Universities of Bristol, Oxford and Manchester together with the Open University. The research is focussed on understanding the characteristics of welded joints between austenitic stainless steels and ferritic steels that are widely used in many nuclear power generating plants and petrochemical industries as well as conventional coal and gas fired power systems. In the steam generator circuit of sodium cooled fast breeder reactors stainless steel pipes from the intermediate heat exchangers are required to join with a ferritic steel pipe of steam generators. In these welds a transition bond is formed where the chemical composition, microstructure, stress state, physical properties, and mechanical properties vary spatially. These welds are called dissimilar metal welds. To reduce the mismatch between the two steels created when operated at high temperature the thermal expansion coefficient across the joint is reduced with the insertion of a nickel alloy pipe section and using nickel alloy welds having thermal expansion coefficients intermediate between austenitic and ferritic steels. However, premature creep failure is also encountered in such dissimilar weld joints. To provide an understanding of the operating life of the weld it is essential to gain an understanding of the microstructural changes across the weld interface between ferritic and austenitic alloys and their effects on high-temperature creep deformation and fracture behaviour. The objectives of this research are summarised as follows: 1) to model and test the effects of metallurgical and structural aspects of welds, 2) to develop material models and 3) to develop reliable methods to monitor the material
Publications (none)
Final Report (none)
Added to Database 18/03/13