考虑微观组织演化的DD6单晶高温合金蠕变剩余寿命预测  

Creep residual life prediction of DD6 single crystal superalloy considering microstructure evolution

作　　者：尤文超 王荣桥[1,2,3] 胡殿印 赵炎 潘锦超 张斌 陈校生 YOU Wenchao;WANG Rongqiao;HU Dianyin;ZHAO Yan;PAN Jinchao;ZHANG Bin;CHEN Xiaosheng(School of Energy and Power Engineering,Beihang University,Beijing 100191,China;United Research Center of Mid-Small Aero-Engine,Beijing 100191,China;Beijing Key Laboratory of Aero-Engine Structure and Strength,Beihang University,Beijing 100191,China;Research Institute of Aero-Engine,Beihang University,Beijing 100191,China)

机构地区：[1]北京航空航天大学能源与动力工程学院,北京100191 [2]中小型航空发动机联合研究中心,北京100191 [3]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,北京100191 [4]北京航空航天大学航空发动机研究院,北京100191

出　　处：《航空动力学报》2024年第9期106-112,共7页Journal of Aerospace Power

基　　金：国家自然科学基金(52022007,51875020);国家科技重大专项(2017-Ⅳ-0004-0041,J2019-Ⅳ-0009-0077,J2019-Ⅳ-0016-0084)。

摘　　要：以DD6单晶高温合金为研究对象,通过描述微观组织演化现象分析材料位错运动硬化机制,建立考虑微观组织演化的多尺度蠕变本构模型;并通过表征蠕变损伤状态,提出考虑蠕变损伤的材料蠕变剩余寿命预测方法。试验结果表明:该蠕变模型比θ映射模型模拟精度提高了57.6%,模型参数比K-R损伤模型减少了1/3;基于蠕变剩余寿命模型的预测结果的平均预测误差为5.59%,说明模型的有效性。DD6 single crystal superalloy was taken as the research object to analyse the hardening mechanism of material dislocation movement by describing the microstructure evolution phenomenon,and a multi-scale creep constitutive model considering microstructure evolution was established;then a creep residual life prediction method considering the creep damage by characterizing the creep damage state was proposed.The experimental results showed that the creep model improved the simulation accuracy by 57.6%compared with theθprojection method,and the model parameters were reduced by 1/3 compared with the K-R damage model.The average prediction error of the creep residual life model prediction results was only 5.59%,indicating the validity of the model.

关 键 词：DD6单晶高温合金 蠕变 本构模型 微观组织演化 剩余寿命 

分 类 号：V23[航空宇航科学与技术—航空宇航推进理论与工程]