Neutron residual stress measurement on dissimilar weld joint under cyclic thermal loading

Akita, Koichi; Suzuki, Hiroshi  ; Moriai, Atsushi; Harjo, S.   ; Nishikawa, Satoru*

To clarify the relaxation process on dissimilar metal weld joints, stress measurements during thermal cycles from RT to 593 K were conducted using a neutron engineering diffractometer, TAKUMI in J-PARC. The effects of the difference in thermal expansion coefficient of the materials and the temperature dependence of the yield strength on the residual stress relaxation were discussed based on the experimental results.