| 变温热处理过程的相场模拟及其参数标定 |
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| 引用本文： | 王婵,石磊,石多奇,杨晓光.变温热处理过程的相场模拟及其参数标定[J].航空工程进展,2019,10(2):255-262. |
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| 作者姓名： | 王婵 石磊 石多奇 杨晓光 |
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| 作者单位： | 北京航空航天大学 能源与动力工程学院,北京,100083;利莫瑞克大学 工程学院,利莫瑞克 V94 T9PX;北京航空航天大学 能源与动力工程学院,北京 100083;北京航空航天大学航空发动机结构强度北京市重点实验室,北京 100083 |
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| 基金项目： | 国家留学基金资助； 北京航空航天大学博士研究生卓越学术基金资助； |
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| 摘 要： | 航空发动机双性能涡轮盘热处理工艺的研究,大多采用试验的方法建立涡轮盘合金的热处理工艺数据库,但试验法的研究周期长、成本高,提出一种可用于预测变温热处理过程中晶粒演化行为的相场模型。为了模拟不同热处理温度下高温合金的晶粒演化行为,对相场模型进行改进,在相场模型中引入Arrhenius关系,用于描述高温合金晶界运动与温度的量化关系。基于改进的相场模型和拟合的模型参数,计算分析热处理过程中晶粒尺寸的变化和形貌演化规律。结果表明:计算数据与试验数据吻合,晶粒的演化规律与理论分析和试验观察结果一致,证明了拟合的Arrhenius关系中的晶界迁移速率M适用于模拟相应温度下的热处理过程,同时,以上结果也验证了该模型改进方法的可行性及其拟合参数的准确性。
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| 关 键 词： | 航空发动机涡轮盘 晶粒演化 相场模型 Arrhenius关系 晶界迁移率 热处理 |
| 收稿时间： | 2019/1/16 0:00:00 |
| 修稿时间： | 2019/1/24 0:00:00 |
Phase-field modeling of heat treatment process with variable temperature and its parameter calibration |
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| wangchan,Shi Lei,Shi Duoqi and Yang Xiaoguang.Phase-field modeling of heat treatment process with variable temperature and its parameter calibration[J].Advances in Aeronautical Science and Engineering,2019,10(2):255-262. |
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| Authors: | wangchan Shi Lei Shi Duoqi and Yang Xiaoguang |
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| Affiliation: | Beihang University,School of Engineering,Bernal Institute,University of Limerick,Limerick V TPX,Ireland,Beihang University,Beihang University |
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| Abstract: | In order to simulate the grain evolution of superalloy at different heat treatment temperatures, the phase field model was improved by introduced the Arrhenius relationship, in order to describe the quantitative relationship between the grain boundary movement and temperature. Based on the improved phase field model and fitted model parameters, the grain average size and morphology evolution of superalloy FGH96 during the longer heat treatment process were simulated, and the simulated results were compared with the experimental results. The results show, the calculated data coincide with the experiment data, the evolution law of grain is consistent with the experimental observation and theoretical analysis. These results prove that the grain boundary mobility M in the Arrhenius relationship is suitable for simulating the heat treatment process at the corresponding temperature. At the same time, the feasibility of the improved method and accuracy of the fitted parameters of the phase-field model are verified. |
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| Keywords: | Grain evolution Phase field model Arrhenius relationship Grain boundary mobility Heat treatment |
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