钛合金等温局部加载复杂热变形历史下的三态组织预测（英文）
发布时间：2019-06-21 09:48
【摘要】：建立钛合金等温局部加载三态组织预测模型,以实现三态组织参数与性能的定量调控。逐工步的TA15钛合金等温局部加载实验表明,三态组织形成中存在4个重要组织演化现象:条状α相的生成、各组成相含量变化、条状α相取向变化及条状α相的球化。基于实验结果,总结了工艺条件对上述4种组织演化现象的定量影响规律,在此基础上建立了联系三态组织参数(等轴α相含量、条状α相含量、条状α相取向分布混乱度指数、条状α相的球化分数)与成形条件的三态组织预测模型。然后,将组织模型嵌入有限元模拟软件,建立了基于有限元的等温局部加载三态组织预测模型。通过实验组织观测验证了模型的可靠性与准确性,说明本文作者建立的三态组织模型及其与有限元模型的集成可以有效地预测TA15钛合金等温局部加载三态组织参数。
[Abstract]:The three-state tissue prediction model is established for the isothermal local loading of the titanium alloy to realize the quantitative regulation of the three-state tissue parameters and the performance. The isothermal local loading experiment of TA15 titanium alloy on one-by-one step shows that there are four important organizational evolution phenomena in the formation of three-state tissue: the formation of the strip-like phase, the change of the content of the constituent phases, the change of the orientation of the strip-like phase and the spheronization of the strip-like phase. Based on the experimental results, the quantitative influence of the process conditions on the evolution of the four tissues was summarized, and a three-state tissue parameter (equiaxial phase content, strip-like phase content, strip-like phase-orientation distribution confusion index) was established. The three-state prediction model of the shape of the strip-like phase and the three-state structure of the forming condition. Then, the tissue model is embedded in the finite element simulation software, and the three-state tissue prediction model based on the finite element is established. The reliability and accuracy of the model are verified by the observation of the experimental organization. The three-state tissue model established by the author of this paper and the integration with the finite element model can be used to predict the isothermally and locally-loaded three-state tissue parameters of the TA15 titanium alloy.
【作者单位】： 西北工业大学材料学院凝固技术国家重点实验室;
【基金】：Projects(51605388,51575449)supported by the National Natural Science Foundation of China Project(B08040)supported by the “111” Project,China Project(131-QP-2015)supported by the Research Fund of the State Key Laboratory of Solidification Processing(NWPU),China Project supported by the Open Research Fund of State Key Laboratory of Materials Processing and Die&Mould Technology,Huazhong University of Science and Technology,China
【分类号】：TG146.23
[Abstract]:The three-state tissue prediction model is established for the isothermal local loading of the titanium alloy to realize the quantitative regulation of the three-state tissue parameters and the performance. The isothermal local loading experiment of TA15 titanium alloy on one-by-one step shows that there are four important organizational evolution phenomena in the formation of three-state tissue: the formation of the strip-like phase, the change of the content of the constituent phases, the change of the orientation of the strip-like phase and the spheronization of the strip-like phase. Based on the experimental results, the quantitative influence of the process conditions on the evolution of the four tissues was summarized, and a three-state tissue parameter (equiaxial phase content, strip-like phase content, strip-like phase-orientation distribution confusion index) was established. The three-state prediction model of the shape of the strip-like phase and the three-state structure of the forming condition. Then, the tissue model is embedded in the finite element simulation software, and the three-state tissue prediction model based on the finite element is established. The reliability and accuracy of the model are verified by the observation of the experimental organization. The three-state tissue model established by the author of this paper and the integration with the finite element model can be used to predict the isothermally and locally-loaded three-state tissue parameters of the TA15 titanium alloy.
【作者单位】： 西北工业大学材料学院凝固技术国家重点实验室;
【基金】：Projects(51605388,51575449)supported by the National Natural Science Foundation of China Project(B08040)supported by the “111” Project,China Project(131-QP-2015)supported by the Research Fund of the State Key Laboratory of Solidification Processing(NWPU),China Project supported by the Open Research Fund of State Key Laboratory of Materials Processing and Die&Mould Technology,Huazhong University of Science and Technology,China
【分类号】：TG146.23
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