ICME:Post Forming after Extrusion

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Contents

Key Contacts

  • M.F. Horstemeyer (MsSt)
  • P. Wang (MsSt)
  • E. Marin (MsSt)
  • H. El Kadiri (MsSt)
  • J. Alison (U. of Michigan)
  • M. Li (Ford)
  • A. Luo (GM)
  • W. Misolek (Lehigh U.)

Cyberinfrastructure Needs

unspecified

Expected inputs

  • Material database for Mg alloys, in particular stress-strain curves for various temperatures and strain rates (AZ61, AM30).

AM30 stress-strain curves are shown below:


canimage

AZ61 stress-strain curves are shown below:

more specific task inputs:

  • AM30 and AZ61 pre-extruded billets (Timminco).
  • Experimental data for calibration of macroscopic ISV or flow stress model (task members: China (?), USA-CAVS, USA-Lehigh, Canada (?)): stress-strain curves at different strain rates / temperatures (Materials: AZ61 and AM30). Formal test matrix will be developed jointly between MsSt-CAVS and LU.
  • Experimental results from lab-scale extrusion tests for validation of numerical tools (CAVS).
  • Constitutive ISV framework for plasticity (modeling group at CAVS).

Expected outputs

  • Database for texture and microstructure evolution of AM30 and AZ61
  • VPSC Model parameters (Voce and dislocation based hardening laws) for AM30 and AZ61 at different temperatures and strain rates
  • Fitting routine for ISV material model and VPSC GUI.
  • User material routine for material models (ISV and Barnett’s models).
  • FE models of extrusion process (lab-scale and Timminco’s) predicting flow stress, strain, strain rates and temperatures.

more specific task outputs:

  • Characterization of texture and microstructure of AM30 and AZ61 alloy based pre-extruded billets and rail components.
  • Prediction of texture and microstructure of Extruded AM30 and AZ61 Alloys.
  • Calibrated material model (ISV and Barnett’s) and corresponding numerical implementation into FE codes.
  • Validated crystal plasticity modeling tools (VPSC) to be coupled with the FE-based HyperXtrude model.
  • FE models of the extrusion process (Deform3D and HyperXtrude) predicting flow stress, strain, strain rate and temperature distributions.

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