A multi-scaled model for the fracture toughness of an aluminum alloy
- 144 Downloads
A multi-scaled model for the fracture toughness of an aluminum alloy has been developed that agrees well with the experimental data. It has been shown that fracture toughness decreases as the volume fraction of the first-class (related to microconstituents/inclusions) and second-class (related to second phase precipitates) microcracks increase, with the first-class microcracks have greater and more obvious effects. Thus, decreasing the volume fraction of the microconstituents (normally Fe and Si impurities) can decrease the volume fraction of the first-class microcracks and help improve the fracture toughness. At the same time, decreasing the volume fraction of the precipitates along the grain boundaries can also improve the fracture toughness by decreasing the volume fraction of the second-class microcracks.
KeywordsAluminum Alloy Fracture Toughness Plastic Strain Rolled Plate Large Axis
This work was supported by the Chinese National Key Fundamental Research Project (2005CB623704) on Al.
- 5.Liu G, Zhang GJ, Ding XH, Sun J, Chen KH (2002) The Chin J Nonferrous Metals 12:706Google Scholar
- 15.Kanninen MF, Popelar CH (1985) Advanced fracture mechanics. Oxford University Press, New York, p 300Google Scholar
- 18.Hahn GT, Rosenfield AR (1968) ASTM STP 432:5Google Scholar
- 19.Peel CJ, Forsyth PJE (1970) Technical report 70162. Royal Aircraft Establishment, Farnborough, UKGoogle Scholar