As part of a research programme on Controlled Stress Grinding, a method for characterising the onset temperatures and conditions for the generation of tensile stresses in ground surfaces of several commercial steels has been determined: these steels often find uses in stress critical applications. Thermal stresses, generated by the grinding process, are the most significant cause of tensile surface residual stress in ground component surfaces and are strongly dependent on workpiece material properties, and in particular, elevated temperature yield properties. Experimental determination of temperature from embedded thermocouples and near surface residual stress profiles by X-ray and Neutron Diffraction allow the grinding conditions defining the transitional boundary between compressive and tensile residual stress to be determined. A theoretical model is presented to predict this transition temperature and is compared with experimental data.
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