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| Microstructure and Mechanical Properties of High Manganese Austenite TRIP/TWIP Steels |
| LI Wei1,TANG Zhengyou1,WANG Mei2,DING Hua1,YANG Ping3 |
| 1. School of Materials and Metallurgy of Northeastern University,Shenyang 110004, Liaoning, China; 2. Continuous Foundry Center of Central Iron and Steel Research Institute, Beijing 100081, China; 3. School of Materials Science and Engineering of University of Science and Technology Beijing, Beijing 100083, China |
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Abstract The microstructure and mechanical properties of two high manganese austenite steels during tensile tests at roomtemperature were studied. The results indicate that the steels exhibit transformation induced plasticity(TRIP) and twinning induced plasticity (TWIP) under flow stress. At the initial strain rate of 10-3 s-1, the tensile strengths of 23.8％ Mn and 33％ Mn samples were 666 MPa and 540 MPa and their elongations were 67% and 97% respectively. In the range of initial strain rate of 10-310-1 s-1, nearly no strain rate sensitivity to flow stress in tensile test was observed, but such sensitivity was observed in plasticity. The steel, can be taken as the new generation highstrength and highplasticity automobile steel due to the better integrated mechanical properties.
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Received: 01 January 1900
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2007, Vol. 42 
