Zuo Pengpeng, He Xijuan, Ji Jie, Wu Xiaochun
School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China.
Zhejiang Qingshan Iron and Steel Co., Ltd., Lishui 323903, China.
Materials (Basel). 2024 Nov 24;17(23):5744. doi: 10.3390/ma17235744.
The Ostergren model is simple in form and widely used in engineering practice, also serving as the modeling basis of both the damage differentiation and crack propagation models. However, the shortcomings of the Ostergren model are that the modeling process is affected by thermomechanical fatigue (TMF) test parameters. To establish a TMF life normalized model, a modified Ostergren model based on hysteresis energy damage and TMF data for H13 steel was proposed. The model was successfully applied to TMF life prediction for 4Cr5Mo2V steel. The band of predicted life and test life is basically within the factor of 1.5. In summary, the modified Ostergren model is suitable for the TMF life prediction of Cr-Mo-V-type die-casting die steel.
奥斯特格伦模型形式简单，在工程实践中广泛应用，也是损伤微分模型和裂纹扩展模型的建模基础。然而，奥斯特格伦模型的缺点是建模过程受热机械疲劳（TMF）试验参数影响。为建立TMF寿命归一化模型，提出了基于滞后能量损伤和H13钢TMF数据的改进奥斯特格伦模型。该模型成功应用于4Cr5Mo2V钢的TMF寿命预测。预测寿命与试验寿命的范围基本在1.5倍以内。总之，改进的奥斯特格伦模型适用于Cr-Mo-V型压铸模具钢的TMF寿命预测。
