Zhen-li Mi, Di Tang, Hai-tao Jiang, Yong-juan Dai,  and Shen-sheng Li, Effects of annealing temperature on the microstructure and properties of the 25Mn-3Si-3Al TWIP steel, Int. J. Miner. Metall. Mater., 16(2009), No. 2, pp. 154-158. https://doi.org/10.1016/S1674-4799(09)60026-1
Cite this article as:
Zhen-li Mi, Di Tang, Hai-tao Jiang, Yong-juan Dai,  and Shen-sheng Li, Effects of annealing temperature on the microstructure and properties of the 25Mn-3Si-3Al TWIP steel, Int. J. Miner. Metall. Mater., 16(2009), No. 2, pp. 154-158. https://doi.org/10.1016/S1674-4799(09)60026-1
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Effects of annealing temperature on the microstructure and properties of the 25Mn-3Si-3Al TWIP steel

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  • Microstructures and mechanical properties of the 25Mn twinning induced plasticity (TWIP) steel at different annealing temperatures were investigated. The results indicated that when the annealing temperature was 1000℃, the 25Mn steel showed excellent comprehensive mechanical properties, the tensile strength was about 640 MPa, the yield strength was higher than 255 MPa, and the elongation was above 82%. The microstructure was analyzed by optical microscopy (OM), X-ray diffraction (XRD), and transmission electron microscopy (TEM). Before deformation the microstructure was composed of austenitic matrix and annealing twins at room temperature; at the same time, a significant amount of annealing twins and stacking faults were observed by TEM. Mechanical twins played a dominant role in deformation and as a result the mechanical properties were found to be excellent.
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