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Persistent URL http://purl.org/net/epubs/work/62908
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Record Id 62908
Title Micromechanical Behavior Evolution of Twinning-Induced Plasticity Steels Studied by Neutron Diffraction and Self-Consistent Modeling
Abstract TWIP (Twinning-Induced Plasticity) steels exhibit good ductility at a very high strength level and are therefore promising materials for making automotive parts with complex geometry. The enhanced formability of such steels is attributed to the formation of mechanical twins during plastic deformation. To understand the twinning-related micromechanical behaviors, in-situ time-of-flight (TOF) neutron diffraction experiments under tensile loading were performed at ISIS to study the change in lattice strains for different hkl-planes of a Fe-30Mn-4Si-3Al TWIP steel. The micromechanical behavior in the TWIP steel is further simulated by the self-consistent model considering both dislocation-slipping and twinning activities. The parameters used for describing the micromechanical behavior of the TWIP steels are directly derived from the TOF experiments and TEM observation. A reliable prediction on evolution of hkl lattice strains and grain orientation distribution is achieved while the interaction of slipping and twinning is considered in the studied material undergoing uniaxial tensile deformation.
Organisation ISIS , ISIS-ENGIN-X , STFC
Keywords Engineering
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Language English (EN)
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Presentation Presented at 2011 TMS Annual Meeting & Exhibition , San Diego, USA. 2011