Elastic deformation behavior of each phase on composite material was estimated by using a synchrotron radiation. We can obtain the arbitrary wavelength beam with a Si (111) mono-crystal monochromator. The X-ray diffraction patterns were collected during a 0–20 scan. It was found that we could obtain the phase stress of a Fe-Cr/TiN composite material using X-ray diffraction with synchrotron radiation. Phase stresses were determined from phase X-ray elastic constant (PXEC). The hardening rate of the Fe-Cr matrix phase was controlled by TiN reinforced particle. Measured results agreed with the micromechanics model.
Synchrotron Radiation (SR) is an electromagnetic wave accelerated by a magnetic field. Arbitrary wave length using a monochromator were obtained. In this way, diffraction patterns were measured at the constant angle 2θ, where 2θ indicate the diffraction angle. The synchrotron radiation beam has excellent properties of brightness and reactance, compare with the general laboratory level X-ray radiation. It is an effective method to measurement the space of a lattice. The purpose of this study is the analysis of the residual stress in a composite material by the X-ray diffraction method with the SR beam. The Fee-Cr/TiN composite material is used as valve seat parts in diesel engines. Since, dispersed TiN particles provide good wear-resistance, composite material is composed of two or more phases; however, macro- and microstress are generated by the interaction between the composition phases. Stress in individual phases is called phase stress (No yan, 1983) and is measured by the X-ray method. As a result, the SR beam is a very effective method. Whereas conventional X-ray analyses are used commonly for sintered nondestructive evaluation, residual phase stress in composite materials using synchrotron radiation, to our knowledge, has not been performed before.
