Details of Grant 

EPSRC Reference:	GR/R48162/01
Title:	MPE: Advanced stress analysis by laboratory x-ray diffraction
Principal Investigator:	Korsunsky, Professor AM
Other Investigators:	Grant, Professor P Nowell, Professor D
Researcher Co-Investigators:
Project Partners:
Department:	Engineering Science
Organisation:	University of Oxford
Scheme:	Standard Research (Pre-FEC)
Starts:	01 July 2001	Ends:	30 June 2002	Value (£):	73,911
EPSRC Research Topic Classifications:	Materials testing & eng.
EPSRC Industrial Sector Classifications:
Related Grants:
Panel History:
Summary on Grant Application Form
A state-of-the-art X-ray diffractometer facility for stress measurement in engineering materials and components will be established. An integrated loading device for in situ tensile and bending stress application, controlled from the main computer acquisition system, will be designed, manifactured, and installed. The system will be commissioned and tested using representative samples of fine grained engineering alloys wellcharacterised using neutron diffraction and synchrotron and laboratory X-rays.The validity and accuracy of the conventional sin2psi approach over a wide range of applied strain will be examined, by comparison with precisely known applied macrostress, and elasto-plastic self-consistent modelling. Stress interpretation procedures by multiple peak analysis (pattern decomposition and whole pattern fitting) will be developed in specific application to stress measurement using laboratory X-ray diffraction.The additional utility of multiple peak analysis lies in the more accurate and complete characterisation of the stress state within the polycrystal. In particular, the relative displacement of individual diffraction peaks during monotonic and cyclic loading will be examined. The evolution of intergranular stress and other damage-related parameters will be used in order to assess component lifetime, in the context of several on-going research projects in this area.
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Organisation Website:	http://www.ox.ac.uk