基于響應面法的TA15鈦合金顯微組織預報和優(yōu)化
發(fā)布人：上海艾荔艾合金股份有限公司www.shailiai.cn
更新時間：2016-06-03
對在不同參數(shù)下熱變形后水冷的TA15合金進行800 ℃保溫1 h的真空退火熱處理，借助于電子背散射衍射(EBSD)技術，分析熱變形參數(shù)對TA15合金退火顯微組織的影響。針對TA15合金熱加工工藝參數(shù)與顯微組織特征參數(shù)之間高度復雜的非線性關系，提出利用響應面法建立二者之間的量化模型，給出表征工藝參數(shù)與顯微組織特征參數(shù)之間的響應面函數(shù)。
基于響應面法的TA15鈦合金顯微組織預報和優(yōu)化Prediction and optimization of TA15 titanium alloy microstructure based on response surface methodology對在不同參數(shù)下熱變形后水冷的TA15合金進行800 ℃保溫1 h的真空退火熱處理，借助于電子背散射衍射(EBSD)技術，分析熱變形參數(shù)對TA15合金退火顯微組織的影響。針對TA15合金熱加工工藝參數(shù)與顯微組織特征參數(shù)之間高度復雜的非線性關系，提出利用響應面法建立二者之間的量化模型，給出表征工藝參數(shù)與顯微組織特征參數(shù)之間的響應面函數(shù)。同時，對響應面模型進行多目標可視化優(yōu)化，獲得最優(yōu)工藝參數(shù)范圍:變形溫度為950 ℃，應變速率為0.063~0.1 s-1，變形量為0.4~0.6時可以獲得具有優(yōu)異綜合力學性能的三態(tài)組織;變形溫度為1000 ℃，應變速率為0.1~0.316 s-1，變形量為0.2~0.45時可以獲得具有高損傷容限性的片層組織。
TA15 titanium alloy deformed at different parameters was conducted heat treatment at 800 ℃ and kept for 1 h, and at the same time the electron backscattered diffraction (EBSD) technique was applied to analyze the influence of thermal deformation parameters on the microstructure of annealed TA15 titanium alloy. As the result that the highly complex nonlinear relationship between process parameters and microstructure parameters of TA15 titanium alloy, a quantitative prediction model was built based on the response surface methodology (RSM), the response surface function representation of process parameters and microstructure characteristic parameters were obtained. In addition, the optimal process parameters were obtained by multi-objective visualization optimization. The results show that it can be obtained tri-modal microstructure with excellent mechanical properties at 950 ℃, strain rates of 0.063-0.1 s-1, the amount of deformation of 0.4-0.6. However, it can be obtained lamellar structure with high damage tolerance at 1000 ℃, strain rates of 0.1-0.316 s-1, the amount of deformation of 0.2-0.45.
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