Acta Metallurgica Sinica (English Letters) ›› 1990, Vol. 3 ›› Issue (4): 262-267.

• • 上一篇    下一篇

STATISTICAL MODEL FOR FRACTURE TOUGHNESS OF A MODIFIED Al-7Si-0.45Mg CAST ALLOY

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   

  • 收稿日期:1990-08-25 修回日期:1990-08-25 出版日期:1990-08-25 发布日期:2009-10-10

STATISTICAL MODEL FOR FRACTURE TOUGHNESS OF A MODIFIED Al-7Si-0.45Mg CAST ALLOY

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   

  • Received:1990-08-25 Revised:1990-08-25 Online:1990-08-25 Published:2009-10-10

PDF (PC)

709

摘要： <正> The statistical model for the fracture toughness of a modified Al-7Si-0.45Mg cast alloy hasbeen proposed on the basis of analysis of the correlation between the size distribution of cracknuclei 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.

Abstract: 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.

Key words: cast Al alloy, fracture toughness, statistical model