【摘 要】
：
Microstructures and mechanical properties of the 25Mn twinning induced plasticity (TWIP) steel at different annealing temperatures were investigated.The results
【机 构】
：
National Engineering Research Center for Advanced Rolling Technology
【基金项目】
：
the Specialized Research Foundation for the Doctoral Program of Higher Education of China;国家高技术研究发展计划(863计划);国家自然科学基金
论文部分内容阅读
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 ex-cellent 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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