Analysis of Residual Stresses Using the sin 2 Ψ Method for Al 2 O 3 Materials before and after Grinding and Heat Treatment Processes

This work presents the results of analysis of residual stresses generated at various stages of production of Al2O3 sinters (sintering, mechanical processing). Residual stresses were determined by the g-sin 2 X-ray method. The process of ceramic sintering of Al2O3 was carried out at varying parameters: temperature and heating time, heating rate, cooling rate. After mechanical processing (grinding), the materials were subjected to heat treatment, consisting of heating to temperatures in the range of 600–1200°C. In order to determine the mechanical properties of the materials, HV30, HV0.3 and HV0.1 hardness measurements were made. KIc and HVG stress intensity index values were also determined.