In situ neutron diffraction measurement of transient temperature and stress fields in a thin plate

Wanchuck Woo, Zhili Feng, Xun Li Wang, Ke An, Camden R. Hubbard, Stan A. David, Hahn Choo

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20 Scopus citations

Abstract

Separating the elastic and thermal strains has been a long standing problem for in situ neutron diffraction measurement of transient temperature and stress fields. Using the plane stress condition, we demonstrate a method to decompose the thermal and elastic strains from the measured lattice spacing changes. The method was validated using a thin plate subjected to a local moving heat source. The methodology developed herein has practical applications for a variety of materials processing technologies such as welding, forming, and heat treatment.

Original languageEnglish
Article number261903
JournalApplied Physics Letters
Volume88
Issue number26
DOIs
StatePublished - 2006

Funding

This research is sponsored by the Laboratory Directed Research and Development program of Oak Ridge National Laboratory (ORNL), managed by UT-Battelle, LLC for the U. S. Department of Energy under Contract No. DE-AC05-00OR22725. It is also in part supported by the NSF International Materials Institutes (IMI) Program under Contract No. DMR-0231320. The authors would like to thank A. Frederick and W. B. Bailey for their help during experiments.

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