Microstructure Characteristics of an Fe-Mn-C TWIP Steel After Deformation

钢铁研究学报(英文版), 2010, 17(9): 53-59.

^1, , ^2, , ^3, , ^4,

1.National Engineering Research Center for Advanced Rolling Technology,University of Science and Technology Beijing,Beijing 100083,China; School of Materials Science and Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,Hebei,China

2.School of Materials Science and Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,Hebei,China

3.School of Materials Science and Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,Hebei,China

4.School of Materials Science and Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,Hebei,China

基金项目: National Natural Science Foundation of China(50575022) National High-Technology Research and Development Program(2008AA03E502)

Microstructure Characteristics of an Fe-Mn-C TWIP Steel After Deformation

DAI Yong-juan ^1, , TANG Di ^2, , MI Zhen-li ^3, , L(U) Jian-chong ^4,

2.School of Materials Science and Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,Hebei,China

3.School of Materials Science and Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,Hebei,China

4.School of Materials Science and Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,Hebei,China

Keywords： planar glide

The microstructure characteristics of an Fe-Mn-C TWIP steel after deformation are investigated. The resultsshow that the hot-rolled, cold-rolled and then annealed sample of the Fe-Mn-C TWIP steel has excellent mechanicalproperties, and the true stress-true strain curve from tension tests exhibits repeated serrations. The deformedmicrostructure exhibits the typical planar glide characteristics such as no cell formation, dislocation pile-ups on a single slip plane, mechanical twins and stacking faults. There are equiaxial and deep dimple structures in the fraetograph, indicative of a ductile fracture. Microcracks initiate from inclusions and twin-twin intersections. Deformationand fracture processes are the formation, growth and coalescence of microvoids.

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Microstructure Characteristics of an Fe-Mn-C TWIP Steel After Deformation

参考文献