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Supper strong nanostructured TWIP steels for automotive applications |
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| Authors: | GW Yuan and MX Huang |
| Institution: | Shenzhen Institute of Research and Innovation, The University of Hong Kong, Shenzhen, China Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China;Shenzhen Institute of Research and Innovation, The University of Hong Kong, Shenzhen, China Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China |
| Abstract: | A ductile and super strong nanostructured twinning-induced plasticity (TWIP) steels were fabricated by cold rolling and recovery treatment. This strong and ductile nanostructured alloy can be used for the anti-intrusion part of body-in-white. Cold rolling was used to produce intensive nano-twins so that the microstructure was greatly refined. Recovery is employed to anneal dislocations for improving the ductility. A physical model is proposed to describe the relationship between the yield stress and the twin density. Furthermore, the present work also found that the activation energy for recovery is 160 J/mol, which implies that the recovery mechanism is governed by dislocation core diffusion |
| Keywords: | Nanostructure TWIP steel GND Recovery |
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