Overview of Texture Evolution during Friction Stir Welding of Stainless Steel Using Crystal Plasticity and EBSD
Texture evolution during friction stir welding of stainless steel was investigated using both predictions by crystal plasticity and EBSD measurements. Two- and three-dimensional Eulerian formulations are used to model friction stir welding. Plane strain deformation is assumed in a two-dimensional mo...
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Veröffentlicht in: | Materials science forum 2007-01, Vol.550, p.479-484 |
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Hauptverfasser: | , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Texture evolution during friction stir welding of stainless steel was investigated using both
predictions by crystal plasticity and EBSD measurements. Two- and three-dimensional Eulerian
formulations are used to model friction stir welding. Plane strain deformation is assumed in a
two-dimensional model, and an initial uniform texture changes into a torsion texture with monoclinic
sample symmetry after deformation. Around the tool pin, the texture strengthens, weakens and
restrengthens repeatedly. It is found from a simple circular streamline model that the relative
magnitudes of the deformation rate and spin along the streamlines decide textural stability. In order to
consider more complicated material behaviors, such as movement along the thickness direction due
to a threaded tool pin and a tool shoulder, a three-dimensional Eulerian formulation is also
implemented. Materials starting under the tool shoulder travel down to the bottom, producing the
longest material streamlines. Those material points are predicted to have stronger texture components
than others. EBSD results are compared with the predictions. |
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ISSN: | 0255-5476 1662-9752 1662-9752 |
DOI: | 10.4028/www.scientific.net/MSF.550.479 |