TOF Neutron Diffraction Study on Tension Deformation an IF Steel.

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Abstract
We carried out an in situ neutron diffraction study on tensile deformation using the time-of-flight method with a spallation neutron source. We have installed a tensile testing machine which was designed in such a way that the center of a specimen did not move during tensile deformation in high resolution powder diffractometer Sirius. Using an IF steel, we have succesfully measured changes in various (hkl) lattice plane spacings during tensile deformation at room temperature. In this experiment, lattice plane spacings along tension direction and perpendicular direction were measured simultaneously. We obtained macroscopic average starins of the [hkl] grains in elasto-plastic deformation of the bcc polycrystalline specimen.

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