Industrial application of neutron stress measurement in Japan

Saito, Toru; Hayashi, Makoto*; Kobayashi, Shinsho*; Morii, Yukio

Recently, each industry is searching for the most suitable manufacturing process to reduce the cost. Especially, the production method of material, the improvement of processing technique, and the selection of cheap materials are being discussed. Therefore, it is the top-priority issue to examine safety and reliability of the material strength to reexamine these. In the industrial user, residual stress has been evaluated by the X-ray stress measurement or by the finite element method (FEM) etc. Neutron is the only one probe to measure the lattice strain nondestructively at the deep inside of materials. The promotion program of technology transfer on neutron application has been implementing in Japan since 2006. The experiments executed in this program are the residual stress evaluation in the welded boiler tube, carburized steel, and welded sample that imitates the stress measurement in the large structure etc. Some experimental results obtained in the program will be presented at this conference.