Experimental and numerical investigations of yield surface, texture, and deformation mechanisms.pdf

International Journal of Plasticity 41 (2013) 165–188 Contents lists available at SciVerse ScienceDirect International Journal of Plasticity journal homepage: www.else /locate/ijplas Experimental and numerical investigations of yield surface, texture, and deformation mechanisms in AA5754 over low to high temperatures and strain rates Amit Pandey a,b,⇑, Akhtar S. Khan a, Eun-Young Kim c, Shi-Hoon Choi c,⇑, Thomas Gnäupel-Herold d a Department of Mechanical Engineering, University of Maryland, Baltimore County, Baltimore, MD 21250, USA b Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6069, USA c Department of Materials Science and Metallurgical Engineering, Sunchon National University, Sunchon, Jeonnam 540-742, Republic of Korea d NIST Center for Neutron Research, Gaithersburg, MD 20899-8562, USA a r t i c l e i n f o a b s t r a c t Article history: The effects of strain rate and temperature on the yield and flow stress of AA5754 sheets are Received 20 April 2012 presented under uniaxial (tension and compression), dynamic (tension), and simple shear Received in final revised form 29 August 2012 loading conditions. The present study investigates the anisotropic behavior of AA5754 Available online 27 September 2012 sheets through experiments performed in the rolling (RD), 45 to rolling (DD), and trans- verse to rolling (TD) directions at room and elevated temperatures. The experimental Keywords: results show that the strain rate sensitivity varied from