Abstract
During cooling of particle reinforced metal matrix composites (PMMCs) residual microstresses emerge owing to the different physical and mechanical properties of the metal matrix and the coarse quasi-ceramic hard phases. The thermal residual microstress state at the sample surface and in the bulk are analysed using X-ray diffraction and neutron diffraction methods, respectively. While the X-ray diffraction results reveal a strong influence of the sample preparation on the surface residual stress state the results obtained by neutron diffraction are in good agreement with theoretical considerations.
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