Kozłowska Aleksandra, Sławski Sebastian, Borek Wojciech, Grajcar Adam
Department of Engineering Materials and Biomaterials, Faculty of Mechanical Engineering, Silesian University of Technology, 18A Konarskiego Street, 44-100 Gliwice, Poland.
Department of Theoretical and Applied Mechanics, Faculty of Mechanical Engineering, Silesian University of Technology, 44-100 Gliwice, Poland.
Materials (Basel). 2025 Apr 21;18(8):1883. doi: 10.3390/ma18081883.
In this study, the hot deformation behavior of novel 0.17C-3.92Mn-1.02Si-0.53Al-0.22Mo-0.032Ti-0.069V steel during continuous compression was predicted using numerical simulation, providing a reference for optimizing the process. Medium-Mn steels have not been applied for forgings yet. Therefore, their industrial application requires detailed investigations on their hot deformability. Results of finite element (FEM) simulations will be used for further optimization of the press forging process. The material model parameters used in the FEM method were identified based on stress-strain curves registered during hot compression tests carried out using a Gleeble thermomechanical simulator. The numerical simulation and physical investigations were performed at temperatures of 900, 1000 and 1100 °C to reflect a range of temperatures occurring during press forging. The influence of strain rates of 0.05, 0.5 and 5 s on the flow behavior of steel was also investigated. Colored maps of the plastic strain distribution in a sample volume were obtained as a result of the numerical research. The maps allowed for the identification of differently strengthened zones as a result of varied plastic strain. Results of FEM analysis were experimentally validated by hardness measurements. A good correlation between the hardness and plastic deformation zones was obtained. An increase in the material hardness was identified in the zones characterized by the highest plastic strain.
在本研究中，采用数值模拟方法预测了新型0.17C-3.92Mn-1.02Si-0.53Al-0.22Mo-0.032Ti-0.069V钢在连续压缩过程中的热变形行为，为优化工艺提供参考。中锰钢尚未应用于锻件。因此，它们的工业应用需要对其热变形能力进行详细研究。有限元（FEM）模拟结果将用于进一步优化模锻工艺。有限元方法中使用的材料模型参数是根据使用Gleeble热机械模拟器进行热压缩试验时记录的应力-应变曲线确定的。为反映模锻过程中出现的一系列温度，在900、1000和1100℃的温度下进行了数值模拟和物理研究。还研究了0.05、0.5和5 s的应变速率对钢流动行为的影响。数值研究得到了样品体积内塑性应变分布的彩色图。这些图能够识别由于塑性应变不同而强化程度不同的区域。通过硬度测量对有限元分析结果进行了实验验证。硬度与塑性变形区域之间具有良好的相关性。在塑性应变最高的区域，材料硬度有所增加。
