X-ray microbeam investigation of deformation microstructure in microindented Cu
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The deformation microstructure under spherical microindents in single crystal Cu has been investigated with submicron spatial resolution using x-ray structural microscopy. A polychromatic, submicron diameter (0.5 m) microbeam was used in combination with micron-resolution depth profiling to make direct, nondestructive measurements of plastic deformation induced lattice rotations under an indent made with a 69 m radius spherical indenter and 200 mN maximum load. Lattice orientations relative to the underformed crystal were determined as a function of position under the indent using differential-aperture x-ray structural microscopy (DAXM). Rotation-axes and misorientation-angles were determined for micron steps along selected microbeam penetration directions.