Mechanical Engineering Commons^™

Effect Of Residual Thermal Stresses On Fracture Behavior And Mechanical Properties Of Al Sub 2 O Sub 3/Ni Cermets, Guo Jin Li, Da Ming Chen, Xiao Xian Huang, Jing Kun Guo

Faculty Publications

Effect of residual thermal stresses on fracture behavior and mechanical properties of Al₂O₃/Ni cermets was qualitatively explained by using theory on residual thermal stresses. When Ni particles are located within Al₂O₃ grains or Ni content is relatively low, tensile stresses are exerted at Al₂O₃-Al₂O₃ grain boundary. While fracturing, intergranular fracture is easily produced. When Ni particles are dispersed at Al₂O₃ grain boundary or Ni content is relatively high, compressive stresses are exerted at Al₂O₃-Al₂O₃grain boundary. …