|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Material Behavior Characterization via Multi-Directional Deformation of Sheet Metal
||An Experimental and Microstructural Investigation of Biaxial Bauschinger Effects in Sheet Metals
||Markus Härtel, Martin F.-X. Wagner
|On-Site Speaker (Planned)
Classically, the Bauschinger effect refers to a reduction of yield strength after a load path change under uniaxial loading. In this contribution, we present first results of an experimental investigation on Bauschinger effects in the sheet metals DC06 and AA1050 subjected to in-plane biaxial loading: We first performed biaxial tensile tests with cruciform specimens up to different pre-strains. Then, smaller specimens were prepared from the biaxially deformed inner part of the cruciform specimens. With these smaller specimens, we performed biaxial compression tests in a newly developed test-rig. Both materials exhibit distinct Bauschinger effects when subjected to biaxial load path changes. Their mechanical behavior differs from the uniaxial behavior when evaluated by conventional parameters such as Bauschinger Effect factor or Bauschinger strain. We discuss how these novel Bauschinger effects can be rationalized by considering the results of residual stress measurements and TEM investigations at the different stages of biaxial loading.
||Planned: A print-only volume