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| Thermal Stability of Retained Austenite in TRIP Steel After Different Treatments |
| SHI Wen1,LI Lin1,Bruno C De Cooman2,Patrick Wollants3,YANG Chun��xia1 |
| 1. Department of Material Science and Engineering, Shanghai University, Shanghai 200072, China;2. Laboratory for Iron and Steel Making, Department of Material Science and Engineering, Technologiepark 903 BE��9052, Ghent, Belgium; 3. Department MTM, KU Leuven, Heverlee B��3001, Belgium |
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Abstract Thermal decomposition of retained austenite in TRIP steel was investigated by means of differential scanning calorimetry (DSC). The decomposition curve was abnormal, and the decomposition temperature and the activation energy were measured by the Kissinger method, which were all higher than those in quenched steel. The thermal decomposition data of samples soaked in liquid nitrogen after TRIP treatment were all similar to those without additional low temperature treatment. It indicated that there is a high thermal stability in retained austenite of the TRIP steel at low temperature, which was also proved by XRD analysis.
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Received: 01 January 1900
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2008, Vol. 15 
