Hole Expansion Simulations of TWIP Steel Sheet Sample

In this work, the stretch flangeability of a TWIP steel sheet sample was investigated both experimentally and numerically through the hole expansion test. Uniaxial tension and disk compression tests were performed to characterize the flow behavior and plastic anisotropy for the TWIP steel sheet sample. The punch load-stroke curve, hole diameter and specimen surface strain distribution near the hole was measured. Then finite element simulations of the hole expansion test were carried out using the finite element code ABAQUS with three yield criteria: von Mises, Hill 1948 and Yld2000-2d. The predicted and experimental results were compared in terms of the final hole radii and the strain distribution.open111Nsciescopu

Current R&D Trends in Steel Grades for Automotive Applications

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Impulse Internal Friction Analysis of High-damping Fe-Mn Alloys

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Plasticity-enhancement in Ultra-fine Grained Steel by Deformation-induced Twinning and Transformation

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Effect of carbon on the damping capacity and mechanical properties of thermally trained Fe-Mn based high damping alloys

The effect of C on the damping and mechanical properties of thermally trained Fe-17 wt%Mn-X wt%C (0 gamma phase transformation and the anti-ferromagnetic transition in the gamma-phase were observed in the temperature-dependent damping and modulus measurements, respectively. While C had no influence on the intrinsic internal friction of the gamma-phase, small amounts of C significantly reduced the damping associated with the motion of epsilon-gamma interface boundaries and the widening of stacking faults by the movement of partial dislocations. The C content at which these relaxation processes were suppressed, i.e. approximately 0.03 wt%C, coincided with the onset of dynamic strain aging as inferred from the appearance of serrations on the flow curves.115sciescopu