| 镍基单晶合金枝晶典型区域相成分最优化测算法 |
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| 引用本文： | 骆宇时,刘攀,彭志方.镍基单晶合金枝晶典型区域相成分最优化测算法[J].金属学报,2002,38(8). |
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| 作者姓名： | 骆宇时 刘攀 彭志方 |
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| 作者单位： | 1. 武汉大学动力与机械学院,武汉,430072
2. 武汉大学水利与水电工程学院,武汉,430072 |
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| 基金项目： | 国家自然科学基金资助项目 50071042 |
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| 摘 要： | 建立了用于测算镍基单晶高温合金枝晶典型区域相成分的最优化数学模型.根据电子探针对枝晶典型区域成分的测定结果,运用BFGS拟Newton法及CONSTR约束优化算法,可以计算枝晶各典型区域中γ和γ＇相成分.以镍基单晶合金CMSX-2和CMSX-4为对象,对优化测算结果进行了分析,证实了该方法的可行性.
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| 关 键 词： | 镍基单晶高温合金 枝晶典型区域 相成分 最优化 目标函数 |
AN OPTIMIZATION ALGORITHM METHOD FOR ESTI MATION OF CHEMICAL COMPOSITIONS OF PHASES IN TYPICAL DENDRITIC REGIONS IN NICKEL-BASE SINGLE CRYSTAL SUPERALLOYS |
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| LUO Yushi,LIU Pan,PENG Zhifang College of Power and Mechanical Engineering,Wuhan University,Wuhan College of Hydraulic and Electric Engineering,Wuhan University,Wuhan Correspondent: PENG Zhifang,professor,Tel:.AN OPTIMIZATION ALGORITHM METHOD FOR ESTI MATION OF CHEMICAL COMPOSITIONS OF PHASES IN TYPICAL DENDRITIC REGIONS IN NICKEL-BASE SINGLE CRYSTAL SUPERALLOYS[J].Acta Metallurgica Sinica,2002,38(8). |
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| Authors: | LUO Yushi LIU Pan PENG Zhifang College of Power and Mechanical Engineering Wuhan University Wuhan College of Hydraulic and Electric Engineering Wuhan University Wuhan Correspondent: PENG Zhifang professor Tel: |
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| Abstract: | An optimization algorithm model was proposed to estimate the chemical compositions of phases in typical dendritic regions in single crystal superalloys. Based on the EPMA measurement results from typical dendritic regions, the phase compositions in the corresponding regions can be calculated through the application of the BFGS algorithm method (Quasi-Newton's method) and the CONSTR algorithm method. Comparisons in phase composition data obtained from the partitioning coefficient method and from the present optimization algorithm method were made. The feasibility of the present method was verified. |
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| Keywords: | Ni-base single crystal superalloy typical dendritic region phase composition optimization algorithm method objective function |
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