Abstract
The residual stresses in a unidirectionally reinforced P100 Gr/6061 Al metal matrix composite with different thermal histories have been measured using X-ray diffraction (XRD) methods. The study reveals that the maximum residual stresses of the Gr/A1 composite measured by the XRD method are strongly dependent on the yield strength of the aluminium matrix which depends on the thermal history of the sample. The yield strength deduced from the XRD residual stress measurement was used as input data in a finite element analysis program described elsewhere for predicting the residual stresses in the composite. Agreement was found between the measured residual stresses and the finite element analysis over a range of thermal histories. To better understand the thermal-mechanical behavior of the composites, the microstructural features of the composite were characterized by means of electron microscopy and differential scanning calorimetry (DSC).
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