ESS

Analysis tools for analysis of in-situ time-resolved neutron diffraction

Coordinating university:

Chalmers University of Technology,

Project description

The unprecedented neutron flux at the engineering diffractometer BEER at ESS will enable in-situ diffraction to be performed during thermomechanical loading approaching industrial processes and/or service conditions. In order to fully exploit this possibility, computational tools capable of reverse modelling of competing deformation mechanisms in complex materials are required. Such models are not publicly available. The project will develop and implement a state-of-the-art elastic-viscoplastic selfconsistent (EVPSC) crystal plasticity model for analysis and prediction of grain scale response in complex engineering materials during conditions of simultaneously varying load and temperature. In a separate project, this will be made publicly available as a user friendly web application through the ESS data management center. Notably, the models are equally applicable for experiments carried out at constant wavelength neutron sources and monochromatic or energy dispersive X-ray diffraction stations at synchrotrons.

Team

Chalmers University of Technology:

  • Magnus Hörnqvist Colliander, Docent, senior researcher, Department of Physics
  • Hongjia Li, Doctor, Postdoc
  • Magnus Ekh, Professor, Industrial and Materials Sciences
  • Fredrik Larsson, Professor, Industrial and Materials Sciences

Core deliverables

Development and implementation of a finite strain elastic-viscoplastic self-consistent crystal plasticity model for temperature dependent simulation of multiphase materials with or without crystallographic relationships and lattice coherency, including optimization engine for calibration against in-situ neutron scattering data.

Year

2017–2019

Total budget

EUR 200,000

Collaborations

Procurement codes

Information technology