Neutron diffraction measurements of residual stresses in a thermoelastically coupled AA6082 alloy system

The residual stress field induced by a thermoelastic shrink-fitting procedure in a disc-ring system of AA6082 aluminium alloy was investigated by neutron diffraction. Measurements were carried out at two different neutron sources, LLB-Saclay (F) and Riso National Laboratory (DK). Results obtained in both of the experiments were compared with numerical calculations, obtaining a general good agreement. A pre-existing stress state, due to previous treatments (extrusion) was also measured in uncoupled samples.