Evolution of Grain Refinement in AA5083 Sheet Metal Processed by ECAP

Illgen, C.; Frint, P.; Gruber, M.; Volk, W.; Wagner, M. F.-X.

doi:10.1007/978-3-030-36408-3_52

Evolution of Grain Refinement in AA5083 Sheet Metal Processed by ECAP (bibtex)

by C. Illgen, P. Frint, M. Gruber, W. Volk, M. F.-X. Wagner

Abstract:

Achieving superplasticity requires a homogeneous, fine-grained microstructure with (primarily) globular grains. Equal-Channel Angular Pressing (ECAP) is an established method that produces considerable grain refinement. While there is substantial knowledge about work hardening and grain refinement during ECAP of bulk materials, there is only little information on the effect of ECAP on sheet materials. In the present study, AA5083 aluminum sheets are deformed by single and multiple passes using a 120° die that enables processing of sheet metals following novel ECAP routes, like route D. The effect of different ECA-processing routes on microstructural evolution is characterized by EBSD and supported by additional micro-hardness measurements. Our first results presented here clearly show that microstructural evolution during sheet metal ECAP is strongly path dependent. Our study highlights the challenges of sheet metal ECAP (e.g., microstructural gradients) for producing ultrafine-grained microstructures for superplastic applications.

Reference:

Illgen, C., Frint, P., Gruber, M., Volk, W., Wagner, M. F.-X.: Evolution of Grain Refinement in AA5083 Sheet Metal Processed by ECAP, in Light Metals 2020, Springer International Publishing, 2020, ISBN 978-3-03036-408-3, 362-369.

Bibtex Entry:

@InCollection{Illgen2020,
  author    = {Illgen, C. and Frint, P. and Gruber, M. and Volk, W. and Wagner, M. F.-X.},
  title     = {Evolution of Grain Refinement in {AA}5083 Sheet Metal Processed by {ECAP}},
  booktitle = {Light Metals 2020},
  publisher = {Springer International Publishing},
  year      = {2020},
  pages     = {362-369},
  month     = jan,
  isbn      = {978-3-030-36408-3},
  abstract  = {Achieving superplasticity requires a homogeneous, fine-grained microstructure with (primarily) globular grains. Equal-Channel Angular Pressing (ECAP) is an established method that produces considerable grain refinement. While there is substantial knowledge about work hardening and grain refinement during ECAP of bulk materials, there is only little information on the effect of ECAP on sheet materials. In the present study, AA5083 aluminum sheets are deformed by single and multiple passes using a 120° die that enables processing of sheet metals following novel ECAP routes, like route D. The effect of different ECA-processing routes on microstructural evolution is characterized by EBSD and supported by additional micro-hardness measurements. Our first results presented here clearly show that microstructural evolution during sheet metal ECAP is strongly path dependent. Our study highlights the challenges of sheet metal ECAP (e.g., microstructural gradients) for producing ultrafine-grained microstructures for superplastic applications.},
  doi       = {10.1007/978-3-030-36408-3_52},
}