Cavity nucleation in Al 5083 alloys
In this paper the authors address the controversial issue of nucleation of cavities in Al 5083 alloys. They focus on the origin of cavities during the manufacture of these alloys into SPF (superplastic forming) sheet form. Experimental observations on the pre-existing cavities in this alloy are made using optical and electron microscopy. The effects of rolling direction and state of stress during superplastic deformations on the formation of cavities are also discussed. Numerical simulations of the sheet manufacturing process are carried out to understand the effect of hard phase/matrix, mechanical properties and interfacial strength on the origin of cavities. Based on the numerical results, a simplified model relating the process, material parameters and the cavity nucleation is presented.
- Research Organization:
- Florida State Univ., Tallahassee, FL (US)
- OSTI ID:
- 20104681
- Resource Relation:
- Conference: 1999 Materials Research Society Fall Meeting, Boston, MA (US), 11/29/1999--12/01/1999; Other Information: PBD: 2000; Related Information: In: Superplasticity -- Current status and future potential. Materials Research Society symposium proceedings, Volume 601, by Berbon, P.B.; Berbon, M.Z.; Sakuma, T.; Langdon, T.G. [eds.], 386 pages.
- Country of Publication:
- United States
- Language:
- English
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