Microstructural Development and Deformation Mechanisms during Cold Rolling of a Medium Stacking Fault Energy TWIP Steel

作者：Ofei K A^*; Zhao L; Sietsma J

来源：Journal of Materials Science & Technology, 2013, 29(2): 161-167.

DOI：10.1016/j.jmst.2012.11.002

• TWIP steel
• alpha '-Martensite
• Sub-grain size
• Probability of stacking fault formation
• Texture development

The magnetic response, microstructural and texture changes occurring during cold rolling of a Fe-14Mn-0.64C-2.4AI-0.25Si medium stacking fault energy TWIP (twinning induced plasticity) steel have been studied by X-ray diffraction and magnetic techniques. The changes in the sub-grain size (D-s), probability of stacking fault formation (P-sf) and microstrain in the material as cold rolling progressed were determined by using a modified version of the Williamson and Hall equation. A strong development of the crystallographic texture with increasing deformation was observed. Deformation-induced formation of a small fraction alpha '-nnartensite was observed, indicating that the steel also exhibits gamma -> alpha '-martensite transformation during cold rolling, which is discussed via the changes of the stacking-fault probability and the texture development during cold rolling.

• 出版日期2013-2