Modification of Olson–Cohen model for predicting stress-state dependency of martensitic transformation
Modification of Olson–Cohen model for predicting stress-state dependency of martensitic transformation
复制标题
用于预测马氏体转变的应力状态依赖性的 Olson-Cohen 模型的修改
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
M. Ketabchi
中科院分区：
文献类型：
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作者：
M. Mansourinejad;M. Ketabchi
通过纳入应力状态对亚稳态奥氏体不锈钢相变动力学的影响，对著名的 Olson-Cohen 模型进行了修改。通过假设等温条件，建立了Olson-Cohen模型参数、应力三轴度和洛德角参数绝对值之间的关系。该模型预测，除了洛德角参数的绝对值之外，饱和度和变换曲线的斜率还随着应力三轴度的增加而增加。对两种奥氏体不锈钢 AISI 304 和 AISI 201 进行了单轴和平面应变拉伸试验，以评估模型的有效性。结果表明，预测的变换曲线与实验数据吻合良好。
The well-known Olson–Cohen model is modified by incorporating the effect of stress state on the transformation kinetics in metastable austenitic stainless steels. By assuming isothermal condition, the relationships between the parameters of Olson–Cohen model, stress triaxiality and absolute value of Lode angle parameter have been established. The proposed model predicts that the saturation level and slope of transformation curve increase with increasing the stress triaxiality in addition to the absolute value of Lode angle parameter. Uniaxial and plane strain tension tests have been conducted on the two types of austenitic stainless steels AISI 304 and AISI 201 to evaluate the validity of the model. The results show that the predicted transformation curves are in good agreement with the experimental data.