Microstructure, crystallographic texture and mechanical properties of the magnesium alloy AZ31B after different routes of thermo-mechanical processing (bibtex)

by S. Seipp, M.F.-X. Wagner, K. Hockauf, I. Schneider, L.W. Meyer, M. Hockauf

Abstract:
In this study the hexagonal close packed magnesium alloy AZ31 is deformed plastically by equal-channel angular pressing (ECAP) at 523 K, bi-directional rolling (BR) at 573 K, and by combinations of these processes. The evolution of microstructures, crystallographic textures and of the mechanical properties is investigated systematically as a function of the processing method, the amount of accumulated strain or the ECAP processing route (strain path). Both BR and ECAP enforce a crystallographic reorientation, with an alignment of (0002) basal planes parallel to the direction of shear deformation. This results in significant changes of the strongly texture-dependent mechanical properties. In combined processing, ECAP is applied as a method to increase texture-induced softening and ductility, whereas BR followed by water quenching is used as a method to induce strengthening by work hardening. The aim of tailoring materials and microstructures that are strong, but still ductile, and that can consume a moderate amount of plastic work during deformation, is best met by a combination of ECAP and subsequent BR. The corresponding yield strength of 345 MPa and elongation to failure of 13.9% demonstrate the considerable potential of the novel processing routes presented here for the first time.
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Reference:
Seipp, S., Wagner, M.F.-X., Hockauf, K., Schneider, I., Meyer, L.W., Hockauf, M.: Microstructure, crystallographic texture and mechanical properties of the magnesium alloy AZ31B after different routes of thermo-mechanical processing, International Journal of Plasticity 35, 155-166, 2012.
Bibtex Entry:
@Article{Seipp2012,
  author    = {Seipp, S. and Wagner, M.F.-X. and Hockauf, K. and Schneider, I. and Meyer, L.W. and Hockauf, M.},
  journal   = {International Journal of Plasticity},
  title     = {{Microstructure, crystallographic texture and mechanical properties of the magnesium alloy {AZ31B} after different routes of thermo-mechanical processing}},
  year      = {2012},
  issn      = {07496419},
  pages     = {155--166},
  volume    = {35},
  abstract  = {In this study the hexagonal close packed magnesium alloy AZ31 is deformed plastically by equal-channel angular pressing (ECAP) at 523 K, bi-directional rolling (BR) at 573 K, and by combinations of these processes. The evolution of microstructures, crystallographic textures and of the mechanical properties is investigated systematically as a function of the processing method, the amount of accumulated strain or the ECAP processing route (strain path). Both BR and ECAP enforce a crystallographic reorientation, with an alignment of (0002) basal planes parallel to the direction of shear deformation. This results in significant changes of the strongly texture-dependent mechanical properties. In combined processing, ECAP is applied as a method to increase texture-induced softening and ductility, whereas BR followed by water quenching is used as a method to induce strengthening by work hardening. The aim of tailoring materials and microstructures that are strong, but still ductile, and that can consume a moderate amount of plastic work during deformation, is best met by a combination of ECAP and subsequent BR. The corresponding yield strength of 345 MPa and elongation to failure of 13.9% demonstrate the considerable potential of the novel processing routes presented here for the first time.},
  doi       = {10.1016/j.ijplas.2012.03.007},
  isbn      = {0749-6419},
  keywords  = {Anisotropic material, Ductility, Equal-channel angular pressing/extrusion (ECAP/ECA, Grain refinement, Rolling},
  publisher = {Elsevier Ltd},
  url       = {http://dx.doi.org/10.1016/j.ijplas.2012.03.007},
}
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