Neutron diffraction stress determination in W-laminates for structural divertor applications

Neutron diffraction measurements have been carried out to develop a non-destructive experimental tool for characterizing the crystallographic structure and the internal stress field in W foil laminates for structural divertor applications in future fusion reactors. The model sample selected for this study had been prepared by brazing, at 1085°C, 13 W foils with 12 Cu foils. A complete strain distribution measurement through the brazed multilayered specimen and determination of the corresponding stresses has been obtained, assuming zero stress in the through-thickness direction. The average stress determined from the technique across the specimen (over both ‘phases’ of W and Cu) is close to zero at −17±32 MPa, in accordance with the expectations.

COPPOLA Roberto;  OHMS Carsten;  REISER Jens;  RIETH Michael;  WIMPORY Robert Charles; 

2015-12-10

Elsevier B.V.

JRC97206

2352-1791,   

http://www.sciencedirect.com/science/article/pii/S2352179115300065,    https://publications.jrc.ec.europa.eu/repository/handle/JRC97206,   

10.1016/j.nme.2015.07.001,