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.
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.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2002年第8期804-808,共5页
Acta Metallurgica Sinica
基金
国家自然科学基金资助项目 50071042
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
测算
数学模型
Ni-base single crystal superalloy, typical dendritic region, phase composition, optimization algorithm method, objective function
