ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Texture evolution during friction stir welding of stainless steel was investigated using bothpredictions by crystal plasticity and EBSD measurements. Two- and three-dimensional Eulerianformulations are used to model friction stir welding. Plane strain deformation is assumed in atwo-dimensional model, and an initial uniform texture changes into a torsion texture with monoclinicsample symmetry after deformation. Around the tool pin, the texture strengthens, weakens andrestrengthens repeatedly. It is found from a simple circular streamline model that the relativemagnitudes of the deformation rate and spin along the streamlines decide textural stability. In order toconsider more complicated material behaviors, such as movement along the thickness direction dueto a threaded tool pin and a tool shoulder, a three-dimensional Eulerian formulation is alsoimplemented. Materials starting under the tool shoulder travel down to the bottom, producing thelongest material streamlines. Those material points are predicted to have stronger texture componentsthan others. EBSD results are compared with the predictions
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.550.479.pdf
Permalink