Application of neutron stress measurement technique to surface treatment parts

Suzuki, Hiroshi  ; Minakawa, Nobuaki*; Akiniwa, Yoshiaki

The residual stress measurements of surface treated mechanical parts were carried out using neutron diffraction. One is a cross pin with carburizing and the other is a large scale joint pin with high-frequency hardening. The residual stress beneath the surface layer of these samples was quite different. The large tensile residual stress was observed at approximately 4 mm depth from surface in the joint pin, while no higher tensile stress existed in the cross pin.