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ZHANG Guobin CHEN Changqi Beijing University of Aeronautics and Astronautics , Beijing , China Dept.of Materials Science and Engineering , Beijing University of Aeronautics and Astronautics , Beijing 100083 , China
金属学报(英文版)
The statistical model for the fracture toughness of a modified Al-7Si-0.45Mg cast alloy has been proposed on the basis of analysis of the correlation between the size distribution of crack nuclei and Si particles and of the micromechanism of fracture.The suitable criterion of frac- ture toughness according to the model has been given.The model has found a good explana- tion for the fracture feature,fracture toughness and microstructure,and agreed with the ex- periments very well.
关键词: cast Al alloy , null , null
张国斌 , 陈昌麒
金属学报
本文根据Al-7Si-0.45Mg铸造合金断裂微观特征的观察、对合金各种力学性能的测量和影响因素的分析以及对由此分析得出的该合金断裂组织控制参量——较大共晶Si粒子的线尺寸及其分布的观察和定量研究,提出了符合该合金断裂过程的微观断裂机理,并把该合金断裂的组织控制参量与断裂性能相联系,在铸造合金中建立了符合合金微观断裂机理的断裂统计模型。
关键词: Al-Si铸造合金 , fracture toughness , statistical model , null
