The Effect of Stress Induced Transforming and Fabricating Residual Stresses on the Fracture Toughness of Mo-Zr02 Sintered Composites
To study the influence of residual stress on fracture toughness of Mo-ZrC2 sintered composites,the fracture toughness and residual stress under material fabrication process were examined experimentally. On based of these experimental results,the effect of initial residual stress,and of size and shape of transformation zone of ZrO2 dispersing secondary particles on toughness enhancement was analyzed numerically by finite element method.The toughnes increment of this material may be explained by the contribution of the effect of t-m stress induced phase transformation of ZrQ2 particle and surface residual stress.
KeywordsResidual Stress Fracture Toughness Transformation Strain Zr02 Content Sintered Material
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