Effect of microstructure and notch root radius on fracture toughness of an aluminum metal matrix composite
Effect of microstructure and notch root radius on fracture toughness of an aluminum metal matrix composite
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DOI：
10.1007/bf00963975
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发表时间：
1989-06
影响因子：
2.5
通讯作者：
M. Manoharan;J. Lewandowski
中科院分区：
文献类型：
--
作者：
M. Manoharan;J. Lewandowski
综述了基体时效条件（基体回火）和缺口根部半径对 SiC 颗粒增强铝合金断裂韧性影响的最新研究结果。获得了未老化和过度老化复合材料的灾难性断裂时的应力强度因子。表观断裂韧性与缺口根部半径的平方根之间发现的线性关系意味着裂纹张开位移与缺口根部半径的线性相关性。结果表明应变控制断裂过程，并表明两种时效条件下的断裂微观机制存在差异。
Recent results on the effects of matrix aging condition (matrix temper) and notch root radius on the measured fracture toughness of a SiC particulate reinforced aluminum alloy are reviewed. Stress intensity factors at catastrophic fracture were obtained for both underaged and overaged composites reveal. The linear relation found between apparent fracture toughness and the square root of the notch root radius implies a linear dependence of the crack opening displacement on the notch root radius. The results suggest a strain controlled fracture process, and indicate that there are differences in the fracture micromechanisms of the two aging conditions.