Deformation modeling of superplastic AA-5083

M. A. Khaleel, K. I. Johnson, C. H. Hamilton, M. T. Smith

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

The superplastic deformation characteristics of a modified aluminum alloy were investigated at temperature range from 500 to 550°C. The alloy chemical composition was 4.69% Mg, 1.56% Mn, 0.177% Cr, 0.03% Si, and 0.07% Fe by weight. Total tensile elongations as high as 750% were observed at lower strain rates. A non-isothermal constitutive equation, that includes the evolution of grain size, was established and implemented in a finite element code. Numerical simulations of the uniaxial tension specimen were performed, and good agreement between the testing and the modeling results was obtained. A pressure control algorithm for the blow forming model was developed based on an averaging scheme that considered a subset of finite elements with the highest strain rate. A pressure history was generated from the finite element simulations for a constant target strain rate of 1 × 10-3s-1. When these pressure histories were used in tray forming experiments, good agreement was obtained between the forming and modeling results.

Original languageEnglish
Pages (from-to)1133-1154
Number of pages22
JournalInternational journal of plasticity
Volume14
Issue number10-11
DOIs
Publication statusPublished - 1 Jan 1998

    Fingerprint

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Khaleel, M. A., Johnson, K. I., Hamilton, C. H., & Smith, M. T. (1998). Deformation modeling of superplastic AA-5083. International journal of plasticity, 14(10-11), 1133-1154. https://doi.org/10.1016/S0749-6419(98)00051-5