【摘要】：建立鈦合金等溫局部加載三態(tài)組織預測模型,以實現(xiàn)三態(tài)組織參數(shù)與性能的定量調控。逐工步的TA15鈦合金等溫局部加載實驗表明,三態(tài)組織形成中存在4個重要組織演化現(xiàn)象:條狀α相的生成、各組成相含量變化、條狀α相取向變化及條狀α相的球化。基于實驗結果,總結了工藝條件對上述4種組織演化現(xiàn)象的定量影響規(guī)律,在此基礎上建立了聯(lián)系三態(tài)組織參數(shù)(等軸α相含量、條狀α相含量、條狀α相取向分布混亂度指數(shù)、條狀α相的球化分數(shù))與成形條件的三態(tài)組織預測模型。然后,將組織模型嵌入有限元模擬軟件,建立了基于有限元的等溫局部加載三態(tài)組織預測模型。通過實驗組織觀測驗證了模型的可靠性與準確性,說明本文作者建立的三態(tài)組織模型及其與有限元模型的集成可以有效地預測TA15鈦合金等溫局部加載三態(tài)組織參數(shù)。
[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.
【作者單位】： 西北工業(yè)大學材料學院凝固技術國家重點實驗室;
【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
【分類號】：TG146.23

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