Microstructural development and its effect on tensile properties of a Fe- 24Ni-0.3C Transformation Induced Plasticity (TRIP) steel subjected to repetitive corrugation and straightening via rolling (RCSR) process was investigated in this study. Microstructure developed during the application of one to 45 cycles of RCSR on TRIP steel sheets were analyzed by optical microscope and scanning electron microscope (SEM) equipped with electron backscatter diffraction detector and X-ray diffraction techniques. Results indicated that the volume fraction of martensite formed due to the deformation-induced by amplification of applied strain during RCSR process was about 75% accompanied with the formation of a large fraction of low angle boundaries. To study, tensile and hardness tests were carried out on several deformed samples their mechanical properties. The results also showed that after 40 cycles of the RCSR process, yield strength increased from 150 MPa in the starting material to 1157 MPa in the deformed state. As well, the uniform elongation reduced from 170% to 30% and the hardness value increased from 130 to 340 HV. This amount of improvement in tensile strength for this type of alloy by the application of RCSR has not been reported to date. Therefor the technique used in this research for the improvement of tensile properties can be very helpful for an alloy designer when very high tensile properties for a particular application is required.

在这项研究中，研究了经过反复皱折和轧制矫直的Fe-24Ni-0.3C相变诱发塑性（TRIP）钢的显微组织发展及其对拉伸性能的影响。通过配备电子背散射衍射检测器和X射线衍射技术的光学显微镜和扫描电子显微镜（SEM），对在TRIP钢板上施加1到45个RCSR循环过程中形成的显微​​组织进行了分析。结果表明，在RCSR过程中，由于应变的放大引起的形变引起的马氏体体积分数约为75％，同时形成了大量的低角度边界。为了研究，对几种变形样品的机械性能进行了拉伸和硬度测试。结果还表明，在RCSR过程的40个循环之后，屈服强度从原材料的150 MPa增加到变形状态的1157 MPa。同样，均匀伸长率从170％降低到30％，硬度值从130 HV增加到340 HV。迄今为止，尚未报道通过应用RCSR来提高这种合金的抗拉强度。因此，当需要为特定应用提供非常高的拉伸性能时，本研究中用于改善拉伸性能的技术对合金设计人员可能非常有帮助。均匀伸长率从170％降低到30％，硬度值从130 HV增加到340 HV。迄今为止，尚未报道通过应用RCSR来提高这种合金的抗拉强度。因此，当需要为特定应用提供非常高的拉伸性能时，本研究中用于改善拉伸性能的技术对合金设计人员可能非常有帮助。均匀伸长率从170％降低到30％，硬度值从130 HV增加到340 HV。迄今为止，尚未报道通过应用RCSR来提高这种合金的抗拉强度。因此，当需要为特定应用提供非常高的拉伸性能时，本研究中用于改善拉伸性能的技术对合金设计人员可能非常有帮助。