Abstract
Recently, the third generation synchrotron radiation facility, SPring-8, is shared for industrial use. The hard X-ray in SPring-8 is a very intense narrow beam. Therefore, the stress distribution from the surface to the inside of a machinery member can be measured by high energy X-rays. In this paper, the stress scanning method is explained and the residual stress distribution of the laser-shocked Ti alloy is introduced. In the experiment with high energy white X-rays, the energy dispersive method had sufficient accuracy to measure the residual stress distribution. In addition, the neutron beam has a large penetration depth compared with that of a hard synchrotron X-ray. The stress measurement by neutron diffraction is applied to a large piston pin.
